Can We Use Group By And Where Together

After contributions from other fields such as number theory and geometry, the group notion was generalized and firmly established around 1870. Modern group theory—an active mathematical discipline—studies groups in their own right. To explore groups, mathematicians have devised various notions to break groups into smaller, better-understandable pieces, such as subgroups, quotient groups and simple groups. A theory has been developed for finite groups, which culminated with the classification of finite simple groups, completed in 2004.

Since the mid-1980s, geometric group theory, which studies finitely generated groups as geometric objects, has become an active area in group theory. One advantage of support groups is that they can create an atmosphere in which members feel comfortable talking about and working through very personal issues and experiences. Disclosure - the act of revealing personal information - gives other members a chance to offer support, ideas, and assistance. It also encourages other members to share their own experiences and fosters an atmosphere of trust in the group. To maintain that trust, facilitators may find that they also need to disclose information from time to time. Organization users can join, anyone on the web can ask—People in your organization can add themselves to the group, and anyone on the web can ask to be added to the group.

This option appears only if you're signed in to a work or school account and your administrator has set the option to let group owners allow external members. As community builders, it helps to develop relationships with parents. If a young person sees her parents have relationships with people from the mainstream culture, it can help her feel that their family is accepted. It supports the teen in being more connected to her family and her community--and also, both relationships are critical protective factors for drug and alcohol abuse and other dangerous behaviors. In addition, in building relationships with parents, we develop lines of communication, so when conflicts arise, they can be more easily resolved. Anyone on the web can join—Anyone on the web can add themselves to the group.

If you're signed in to a work or school account, this option appears only if your administrator has set the option to let group owners allow external members. Anyone on the web can ask—Anyone on the web can ask to be added to the group. Anyone can join—Anyone on the web can add themselves to the group. Anyone can ask—Anyone on the web can ask to be added to the group. Such groups are called topological groups, and they are the group objects in the category of topological spaces.

The most basic examples are the group of real numbers under addition and the group of nonzero real numbers under multiplication. Similar examples can be formed from any other topological field, such as the field of complex numbers or the field of p -adic numbers. These examples are locally compact, so they have Haar measures and can be studied via harmonic analysis.

A generalization used in algebraic geometry is the étale fundamental group. Now, that we've created this select statement within our FROM clause, Oracle will let us join these results against our original report_history table. So we've joined the report_name and report_run_date fields between the tables called rh and maxresults. This allows us to retrieve the report_name, max as well as the user_name. The Group by clause is often used to arrange identical duplicate data into groups with a select statement to group the result-set by one or more columns. This clause works with the select specific list of items, and we can use HAVING, and ORDER BY clauses.

Group by clause always works with an aggregate function like MAX, MIN, SUM, AVG, COUNT. As community workers, we need to support and respect minority and immigrant families and their values. It may already be a huge concession on the part of a family to allow a teenager to participate in extracurricular activities at all.

We need to make allowances for the cultural differences and try to help young people feel that they can have both worlds--instead of having to reject one set of values for another. We all carry misinformation and stereotypes about people in different cultures. Especially, when we are young, we acquire this information in bits and pieces from TV, from listening to people talk, and from the culture at large. We are not bad people because we acquired this; no one requested to be misinformed. But in order to build relationships with people of different cultures, we have to become aware of the misinformation we acquired.

Who can view conversations Choose who can see conversations posted to the group. Who can post Choose who can send messages to the group email address. Who can view members Choose who can view the group's member list. Group content classification Choose whether the group content is suitable for everyone or adults only.

If you choose adults only, you can't change this setting later. Computer algebra systems can be used to list small groups, but there is no classification of all finite groups. An intermediate step is the classification of finite simple groups. A nontrivial group is called simple if its only normal subgroups are the trivial group and the group itself. The Jordan–Hölder theorem exhibits finite simple groups as the building blocks for all finite groups. Listing all finite simple groups was a major achievement in contemporary group theory.

These three conditions, called group axioms, hold for number systems and many other mathematical structures. For example, the integers together with the addition operation form a group. The concept of a group and its definition through the group axioms was elaborated for handling, in a unified way, essential structural properties of entities of very different mathematical nature . Because of the ubiquity of groups in numerous areas , some authors consider them as a central organizing principle of contemporary mathematics. For many people, a health-related support group may fill a gap between medical treatment and the need for emotional support.

A person's relationship with a doctor or other medical personnel may not provide adequate emotional support, and a person's family and friends may not understand the impact of a disease or treatment. A support group among people with shared experiences may function as a bridge between medical and emotional needs. It helps to read about and learn about people's cultures and histories.

If you know something about the reality of someone's life and history, it shows that you care enough to take the time to find out about it. It also gives you background information that will make it easier to ask questions that make sense. People, for the most part, want to be asked questions about their lives and their cultures. Many of us were told that asking questions was nosy; but if we are thoughtful, asking questions can help you learn about people of different cultures and help build relationships. People are usually pleasantly surprised when others show interest in their cultures.

If you are sincere and you can listen, people will tell you a lot. Geometric properties that remain stable under group actions are investigated in invariant theory. Expression_n Expressions that are not encapsulated within the MAX function and must be included in the GROUP BY clause at the end of the SQL statement.

Aggregate_expression This is the column or expression from which the maximum value will be returned. Tables The tables that you wish to retrieve records from. There must be at least one table listed in the FROM clause. These are conditions that must be met for the records to be selected. Families have different values, especially when it comes to family closeness, loyalty, and responsibility. In many immigrant and ethnic families, young people are required to put their family's needs first, before the requirements of extra-curricular activities.

One of the first and most important steps is to show up in places where you will meet people of cultures other than your own. Go to meetings and celebrations of groups whose members you want to get to know. Or hang out in restaurants and other gathering places that different cultural groups go.

You may feel embarrassed or shy at first, but your efforts will pay off. People of a cultural group will notice if you take the risk of coming to one of their events. If it is difficult for you to be the only person like yourself attending, you can bring a buddy with you and support each other in making friends. At these events, it is important to participate, but make sure you do not become the center of the event in order to lift up the voices and actions of the people leading the event. Learn how to understand cultures and build relationships with people from other cultures. Support consists of making statements that show your understanding, sympathy, and concern.

Listen for the feelings expressed by the member, and address those feelings. Support can also be expressed through body language or touch (hugging, patting the member's arm). Together SC seeks to create space for its Black members to increase their impact within the nonprofit and philanthropic sectors while being affirmed, supported, and encouraged. Group members will bring different skill sets and various amounts and types of background knowledge to the table. Unlike multiple layers selected at the same time, linked layers retain their relationship until you unlink them. You can move or apply transformations to linked layers.

Everyone's talking about diversity – but what's it all about? We are devoted to our employees' well-being and personal development. We embrace all forms of diversity and inclusion and show understanding and respect in our dealings with each other. We promote a multi-cultural environment where employees work together in worldwide teams to reach their full potential and enrich our culture. Our goal is and will always be to mirror this diverse and inclusive culture in our organization. Post suspicious messages to the group—Deliver messages marked as spam to the group.

This option appears only if you're signed in to a work or school account. Organization users can ask—People in your organization can ask to be added to the group. Organization users only—People in your organization can add themselves to the group. Anyone in the organization can join—People in your organization can add themselves to the group.

Anyone in the organization can ask—People in your organization can ask to be added to the group. The GROUP BY statement is often used with aggregate functions (COUNT(),MAX(),MIN(), SUM(),AVG()) to group the result-set by one or more columns. The risk is that piecemeal approaches will solve one problem but make another worse. That's why we need co-created recommendations that align stakeholders around solutions.

Coherence must be at the heart of our work, so we need to be fully transparent and share information. I know our tech team have already set up some digital tools. When you join a new support group, you may be nervous about sharing personal issues with people you don't know. Over time, however, contributing your own ideas and experiences may help you get more out of a support group. Formats of support groups vary, including face-to-face meetings, teleconferences or online communities.

A support group provides an opportunity for people to share personal experiences and feelings, coping strategies, or firsthand information about diseases or treatments. As individuals, and in groups, we can change our communities. We can set up neighborhoods and institutions in which people commit themselves to working to form strong relationships and alliances with people of diverse cultures and backgrounds. We can establish networks and coalitions in which people are knowledgeable about each other's struggles, and are willing to lend a hand.

One of the best ways to help you build relationships with people of different cultures is to demonstrate that you are willing to take a stand against discrimination when it occurs. People will be much more motivated to get to know you if they see that you are willing to take risks on their behalf. In some cultures, people feel uncomfortable with silence, so they speak to fill the silences. In other cultures, it is customary to wait for a period of silence before speaking.

Can We Use Group By And Having Clause Together If there aren't any silences, people from those cultures may not ever speak. You can join a sports team or club, become active in an organization, choose a job, or move to a neighborhood that puts you in contact with people of cultures different than your own. Also, you may want to take a few minutes to notice the diversity that is presently nearby. If you think about the people you see and interact with every day, you may become more aware of the cultural differences that are around you.

And in order to work with people from different cultural groups effectively, you will need to build sturdy and caring relationships based on trust, understanding, and shared goals. Our one-to-one connections with each other are the foundation for change. And building relationships with people from different cultures, often many different cultures, is key in building diverse communities that are powerful enough to achieve significant goals. The location should also be somewhere where people can feel comfortable enough to talk about their problems and able to offer each other support. If you're working with survivors of violent crimes, meeting in a high crime section of town or next door to the county jail might make people in your group uneasy or reluctant to even show up.

Picking a good location is far more crucial than you might think. You might find that a school, church, restaurant, library, or some other public building is better suited to your needs. A support group for former child molesters might want to be as nearly invisible as possible, for instance. While that's a particularly outrageous example, the same might be true for Al-Anon or a group for pregnant teens. It may be tempting to leave all merging, editing, and/or presentation work to one person.

1) The editor/presenter may not completely understand every idea, sentence, or word that another author wrote, leading to ambiguity or even mistakes in the end paper or presentation. The editor often finds himself or herself doing more work than was expected as he or she tries to decipher and merge the original contributions under the time pressure of an approaching deadline. If you decide to follow this path and have one person combine the separate writings of many people, be sure to leave plenty of time for a final review by all of the writers. Ask the editor to send out the final draft of the completed work to each of the authors and let every contributor review and respond to the final product. Ideally, there should also be a test run of any live presentations that the group or a representative may make.

As this is a group writing handout, several Writing Center coaches worked together to create it. No coaches were harmed in this process; however, we did experience both the pros and the cons of the collaborative process. We have personally tested the various methods for sharing files and scheduling meetings that are described here.

However, these are only our suggestions; we do not advocate any particular service or site. Unlike multiple layers selected at the same time, linked layers stay linked when you change the selection in the Layers panel. For other activities, such as moving, aligning, transforming, or applying styles from the Styles panel, you can select and work on multiple layers at a time.

How Can You Make Steel Rust Fast

Rust is formed when oxygen comes into sustained contact with iron in a process called oxidation. Oxygen is delivered to the metal from water, either from liquid water or water vapor. The free oxygen bonds with the dissolved iron to form iron oxide or rust. Oxidation catalysts, such as saltwater and air, acids and acid rain, soils, and airborne sulfur compounds, will accelerate rust formation. Rust formation is also encouraged by architectural crevices that trap liquids. Once rust forms, its porous surface will trap additional liquids and lead to further corrosion.

When any type of steel rusts, including steel, it undergoes a chemical reaction called corrosion. Rust only forms on the outside of a metal surface because it requires exposure of oxygen and water to rust. It occurs when iron combines with the oxygen in the air causing it to corrode. Rust is the orange-brown discoloration that builds up on metal. Rust can affect iron and its alloys, including steel.

Whenever you have iron, water and oxygen together, you get rust. Although iron and steel structures seem solid to the eye, water molecules are able to penetrate microscopic gaps in the metal. If salt is present, for example in seawater, the corrosion will be more rapid. Exposure to sulfur dioxide and carbon dioxide will also hasten the corrosive process. Over time, the oxygen combines with the metal forming new compounds collectively called rust.

The best-known of these reactions involve oxygen, hence the name "oxidation". The terms "rust" and "rusting" only mean oxidation of iron and its resulting products. Many other oxidation reactions exist which do not involve iron or produce rust. But only iron or alloys that contain iron can rust. However, other metals can corrode in similar ways.

Steel will rust immediately when being exposed to moisture and air. While the chemical reaction that causes steel to corode happens instantly, it may take some time for you to notice. Visual signs of rust may appear as quickly as a week or two when exposed to the right conditions. Rusting will affect the exterior of steel first before slowly corroding through the steel surface. Given enough time, all iron in the steel material will oxidize and render the steel essentially useless for the purpose it was intended for.

Luckily, that oxidation process typically takes a long time, and some rusted surfaces can be fixed with a little bit of work as Jay Leno helps to explain. Coating steel with zinc is commonly referred to as galvanizing steel. Steel, among other metals like aluminum and iron, are immersed in 860 degree Fahrenheit zinc. The zinc reacts with oxygen and carbon dioxide to form zinc carbonate, which is seen as the exterior of many metallic objects like street lamps, I-beams, and other steel products. Not only does it give the steel a nice visual appearance, it does an excellent job with preventing rust from forming. Of course, if the exterior surface gets scratched or worn away, then the now exposed steel will begin to corrode.

Given sufficient time, any iron mass, in the presence of water and oxygen, could eventually convert entirely to rust. Surface rust is commonly flaky and friable, and provides no passivational protection to the underlying iron, unlike the formation of patina on copper surfaces. Rusting is the common term for corrosion of elemental iron and its alloys such as steel. Many other metals undergo similar corrosion, but the resulting oxides are not commonly called "rust". Over time, especially outdoors, high humidity or rain will cause the iron to undergo flash rusting and result in ugly rust stains.

Similarly, grinding wheels used on iron should not be used later on other metals, because bits of iron can be transferred to the other metals. Any grinding of iron should be done well away from other metals, so that any iron ejected from the grinding wheel does not land on the other metals. When dealing with an emergency involving water, it has been recommended that unstable metal, such as iron that can corrode quickly, be treated within 48 hours . The results from the procedure in this learning resource to make iron rust demonstrate that a lot of flash rusting can happen in 48 hours. I've had this Maine 'buoy bell' wind chime for about eight years now.

It has the haunting melancholy sound of a bell buoy at sea being tossed by wind and waves. It is made of COR-TEN steel which is designed to rust on the surface to create a protective barrier against further rusting. It came painted black on the outside and was supposed to develop this rich rust patina naturally over time. Seeing it was taking so long, I decided to take things into my own hands and, ah, "help" mother nature along and accelerate the process.

I searched the net and found mostly dangerous methods to induce rust on steel using highly caustic or acidic chemical solutions. However I finally did find a simple safe method, using on-hand household chemicals, buried deep within a thread on the subject at a metalworking forum. I got spectacular results which have not only withstood the wind and rain of the southwest but have actually improved with the help of mother nature. When iron is in contact with water and oxygen, it rusts. If salt is present, for example in seawater or salt spray, the iron tends to rust more quickly, as a result of chemical reactions. Iron metal is relatively unaffected by pure water or by dry oxygen.

As with other metals, like aluminium, a tightly adhering oxide coating, a passivation layer, protects the bulk iron from further oxidation. The conversion of the passivating ferrous oxide layer to rust results from the combined action of two agents, usually oxygen and water. Set the degreased object outdoors or in a well-ventilated area on a piece of cardboard. Work in an area where you can spray rusting solution without affecting nearby surfaces.

Spray your metal object with plain white vinegar, soaking the surface and letting it dry before reapplying. The acidic vinegar lightly etches the metal surface so the piece will rust faster. Rust in water droplets is sometimes observed to form in a ring , as shown in Figure 7. The reduction of oxygen occurs mainly around the outer edge of the drop because the water layer is thinnest there, so oxygen diffuses most rapidly to the metal surface.

The oxidation of iron occurs mainly in the centre of the drop where the concentration of dissolved oxygen is lowest and the accompanying reduction of oxygen is mainly at the edges. Archaeological conservators may encounter flash rusting near the end of a treatment to remove salt from archaeological objects that contain iron. The objects are soaked, sometimes for months or years, in alkaline solutions such as 0.5 M (2% w/v) sodium hydroxide . The solution is changed when the concentration of chloride ions washed from the object builds up. During the soaking, the high pH of the sodium hydroxide solution keeps the iron from rusting, but at the end of the treatment the sodium hydroxide has to be rinsed from the object. During the rinsing, the pH or conductivity are monitored until the rinse solution is close to neutral pH or has low conductivity.

When the pH on the iron surface drops below about 11, the remaining iron metal often starts to rust again, forming the bright orange typical of flash rusting. A less common environment for metal is submerged in or exposed to water. Moisture is highly corrosive to most metals including steel, aluminum, and zinc.

There are many different types of water (pure water, natural fresh water, potable water , and seawater) and each has different mechanisms that determine the corrosion rate. The parameters that affect corrosion of metals in water include pH level, oxygen content, water temperature, agitation, the presence of inhibitors, and tide conditions. Salt accelerates the rusting process by lowering the electrical resistance of water. Rust happens through a chemical process called oxidation in which metal atoms lose electrons, forming ions.

The more easily the electrons flow from iron to oxygen, the quicker the metal rusts. In those states that use road salt during the winter to melt snow, steel car bodies rust more rapidly than in dry desert states. Degrease the stripped metal with a commercial degreaser to remove grime, dirt or remnants of finish that will prevent the chemical reaction that causes rust. Wear protective goggles and gloves every time you handle chemicals during the rust patina process. Do not handle a degreased piece of metal with your bare hands, to avoid any skin oil residue, which repels the rusting solution. If steel wool and carbon steel coupons are not available to show the transfer of rust and iron staining of paper, then try a few common nails instead.

Clean the nails with sandpaper to ensure there is no oil or protective coating to interfere with rusting. Tightly wrap the nails in wet paper towel, and allow the paper towel to air dry. Squeeze out excess liquid from the paper towel before wrapping the nails, and then squeeze the paper towel around the nails to provide good contact. Compare flash rusting on iron in solutions with different concentrations of salts. Instead of tap water, try deionized water or solutions with different concentrations of sodium chloride. Rust will be faster to develop with salt water, and the powdery residue may be darker than with tap water.

Rust will be slower to develop with deionized water and may not form at all before the deionized water evaporates. In an archaeological context, it can occur during rinsing of an iron object with water after an alkaline treatment. Or it can form after roof leaks in historic houses or when a flood occurs in a storage area.

The resulting orange rust may not affect the structural integrity of an object, but it produces a disfiguring appearance. The bright orange corrosion can often be brushed off; for an object that was already corroded, such as an archaeological object, cleaning by simple brushing may be enough. This is accomplished through hot-dip galvanizing or electroplating. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water reaching the metal underneath but the zinc also acts as a sacrificial metal. Zinc is more reactive than iron, so it oxidizes in preference to the iron object.

The zinc oxide layer prevents the formation of iron oxide, thus eliminating the possibility of rust forming. Some things cause steel or iron to rust faster than others. Dissimilar metals rust faster than single metals because of electrochemical reactions, so steel rusts faster than iron, and joints between dissimilar metals rust very quickly.

Salt water will cause rust faster than water because salt water is a better electrical conductor. Like most chemical reactions, heat also speeds rust. Rust is a naturally occurring chemical reaction. Despite the fact that some metals will rust faster than others, it shouldn't deter you from utilizing these metals for certain uses. Each method utilizes different compounds and materials to create a protective barrier between the metal and the elements that cause rust and corrosion. Working in a well ventilated area, pour the peroxide into the spray bottle.

Spray the tin or iron with peroxide, misting generously. Rusting should begin almost immediately, and is sort of fun to watch. Allow items to dry completely, and then rub to remove salt. Different effects can be achieved using more or less salt. I also achieved some nice rusting by letting the items dry, and then remisting them with peroxide to start the process all over again.

Rinsing the rusted item in cold water removes some of the rust, and gives a smoother surface. This is definitely a technique to experiment with fully before you plunge in with a big piece. In damp environments, metals deteriorate quickly as moist air is an ideal medium for rust to form. Even a single droplet of water can in effect become a small battery that allows ions to flow freely between oxygen and iron. The part in which metal is submerged in water, iron atoms lose electrons causing the metal to disintegrate gradually. The iodised iron then gets dissolved into the water to react with the hydroxide ions in the water to form rust.

You will be using an acid, vinegar, and an oxidizer, hydrogen peroxide, so do wear the safety goggles and gloves. It is mildly corrosive and will rust anything made of iron or steel. Do this outdoors preferably in a place sheltered from the wind and away from people or pets. Do use common sense and follow common safety practices. Do not spray chemicals at anything other than the object you are trying to rust.

Obviously don't spray it anywhere near people or animals. If you do get some in your eyes, go and rinse your eyes with cold or lukewarm water immediately. Although the chemicals used are relatively safe, common sense should prevail. If you do not possess common sense, please don't try this at home, or anywhere else for that matter. So you've prepped the metal object for rusting, but how does the oxidation process actually happen?

First, you'll need to create a rusting solution by combining 16oz hydrogen peroxide, 2oz white vinegar, and ½ tablespoon of salt. If possible, mix this solution in the spray bottle with some of the leftover white vinegar. Shake it up so that everything mixes well, and then start spraying down your object. If the rusting doesn't start happening immediately, you may need to put your object in direct sunlight for a while.

It may be helpful for inspectors and homeowners to have some rudimentary knowledge about how to differentiate metals that can rust from metals that cannot rust. Iron and steel are magnetic, while aluminum, copper, zinc, brass and silver are not magnetic. Tin is also magnetic, but its use in building construction is uncommon. Galvanized steel has a dull appearance, while stainless steel is shiny and bright. Copper, which is commonly used in household wiring, has a bright, reddish color, although it can turn green when exposed to air.

Aluminum, a building material commonly used in siding, is silver-colored and shiny. Professionals can perform further tests by exposing the metal to acids, or by measuring the size and color of the sparks produced when the metal is carved. Several forms of rust are distinguishable both visually and by spectroscopy, and form under different circumstances. Other forms of rust include the result of reactions between iron and chloride in an environment deprived of oxygen. Rebar used in underwater concrete pillars, which generates green rust, is an example. The term stainless steel is a reference to the alloy's tendency to resist rust under normal conditions.

The term "flash rusting" has a specific, technical meaning in the world of coatings. There, flash rusting is a problem that occurs after iron has been washed with high-pressure water spray in preparation for painting (ASTM 2015; SSPC/NACE 2002). As the iron dries, it corrodes rapidly and becomes covered with a layer of orange rust. If the rust layer is thin and adherent, paint can be applied over it; if it is thicker and rubs off easily, it must be removed before any paint is applied. Coatings manufacturers specify what degree of flash rusting is acceptable for their products, according to defined standards of flash rusting (SSPC/NACE 2002).

Corrosion inhibitors have been developed to be added to the spray water, to slow the flash rusting until the coating can be applied . The drying time for the large drop of water varies depending on the relative humidity of the room, the temperature and the amount of air circulation. Several hours may be needed before the drop has dried.