Case when sql multiple conditions

The CASE statement is used to implement the logic where you want to set the value of one column depending upon the values in other columns. The WHEN statement specifies the condition to be tested. In this article, case when sql multiple conditions, we will take a look at a number of different examples of the CASE statement. The script above has created a dummy database called ShowRoom with one Table in it called Cars.

If you're an SQL developer or an enthusiast, you're likely to have come across the concept of a case statement in SQL. This is a powerful feature that allows you to perform conditional statements in SQL queries. However, what happens when you need to consider multiple values in the same case statement? How do you work around this challenge? This article will take you through everything you need to know about using multiple values in a case statement in SQL.

Case when sql multiple conditions

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In that case, you can use conditional expressions in your case statement. My W3Schools Tutorials.

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Writing SQL with multiple conditions can be an arduous task, especially if you need to make numerous checks. If the first condition is satisfied, the query stops executing with a return value. The value specified within the else is returned if no condition is satisfied. In programming when you have a given set of conditions, you end up using conditionals switch or if else to know which block of code to execute when a condition is met. You use a THEN statement to return the result of the expression. If none of the conditions are met, then you use a final ELSE clause to return a fallback result. If the first condition is not met it keeps on checking the other conditions until the nth or final condition. If that is still not met then the ELSE condition gets executed. In scenarios where you don't use it, the query result returns NULL. In this section, we will take a case study of a real-life scenario to help you learn how to solve a SQL challenge that uses the CASE statement.

Case when sql multiple conditions

The case statement in SQL returns a value on a specified condition. It can be used in the Insert statement as well. In this article, we would explore the CASE statement and its various use cases. Suppose you have a table that stores the ProductID for all products in a mini-store. You want to get Productname for a particular ProductID. Look at the following example; We declared a variable ProductID and specified value 1 for it. In Case statement, we defined conditions. Once a condition is satisfied, its corresponding value is returned. Similarly, if we change the condition in a Case statement in SQL, it returns appropriate expression.

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Using the previous example, you might first write:. This is known as "pivoting" like a pivot table in Excel. Build fast and responsive sites using our free W3. Try for free Request demo. If they're an adult, it evaluates their gender to determine whether they're male, female, or non-binary. You can see that the condition column contains an X in each row at the moment. It's worth noting that going from horizontal to vertical orientation can be a substantially more difficult problem depending on the circumstances, and is covered in greater depth in a later lesson. Each condition has two parts, separated by the logical operator AND : the lower bound and upper bound of the age range we're interested in. For example, assume you have a table of quarterly sales data, and you need to categorize results based on multiple values, such as product type and region. At the core of its functionality, the CASE statement stands out as a powerful tool that allows query designers to implement flexible logic, enabling the customization and transformation of data within SQL queries. While using W3Schools, you agree to have read and accepted our terms of use , cookie and privacy policy.

I'll guide you through real query examples showcasing the power of this versatile statement.

Remember to handle null values correctly, keep the number of nested case statements to a minimum, and practice efficient query optimization. Practice Problem Write a query that shows the number of players at schools with names that start with A through M, and the number at schools with names starting with N - Z. This article will take you through everything you need to know about using multiple values in a case statement in SQL. FROM Cars. Related articles. The condition column had the value X for all rows. These topics can help you create even more powerful case statements that can handle a wider variety of data scenarios. The flexibility and precision afforded by this construct are invaluable in crafting sophisticated SQL queries for various business requirements. It offers a full range of SQL training from introductory courses through to advanced administration and data warehouse training — see here for more details. Sequential Logic: Executing conditions in a specific order.