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The CASE expression goes through conditions and returns a value when the first condition is met (like an if-then-else statement). So, once a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.
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CASE WHEN Quantity > 30 THEN 'The quantity is greater than...
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SQL Statement: SELECT CustomerName, City, Country FROM...
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SQL for Data Analysis Cheat Sheet. CASE WHEN. CASE WHEN. lets you pass conditions (as in the . WHERE clause), evaluates them in order, then returns the value for the first condition met. SELECT n ame, CASE WHEN price > 150 THEN 'Premium' WHEN price > 100 THEN 'Mid-range' ELSE 'Standard' END AS price_category FROM product;
2 cze 2023 · The CASE statement allows you to perform an IF-THEN-ELSE check within an SQL statement. It’s good for displaying a value in the SELECT query based on logic that you have defined. As the data for columns can vary from row to row, using a CASE SQL expression can help make your data more readable and useful to the user or to the application.
28 cze 2024 · Prosty PRZYPADEK. Przeszukany przypadek. Różnica między przypadkiem prostym a przeszukiwanym. Zagnieżdżony CASE: CASE w IF ELSE. Zagnieżdżony CASE: CASE wewnątrz CASE. CASE z AKTUALIZACJĄ. CASE z zamówieniem. Interesujące fakty! Podsumowanie. Co to jest instrukcja CASE w SQL Server? Nie przegap:
15 wrz 2008 · The CASE statement is the closest to IF in SQL and is supported on all versions of SQL Server. SELECT CAST( CASE. WHEN Obsolete = 'N' or InStock = 'Y' THEN 1. ELSE 0. END AS bit) as Saleable, * FROM Product. You only need to use the CAST operator if you want the result as a Boolean value. If you are happy with an int, this works: SELECT CASE.
20 kwi 2021 · This SQL Tutorial will teach you when and how you can use CASE in T-SQL statements. Solution. The CASE expression is used to build IF … THEN … ELSE statements into your Microsoft SQL Server T-SQL code. CASE is used within a SQL statement, such as SELECT or UPDATE.
16 sty 2024 · In the realm of SQL, the CASE WHEN statement functions much like an if-then-else expression, allowing us to create custom classifications within a query. Other programming languages use similar logic – e.g. Python uses if, elif, and else, and JavaScript uses the switch statement.
