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28 lut 2012 · You can either put another case or use decode (as @madhu suggested): select case. when value in (1000) then null. when user in ('ABC') then user. when area in ('DENVER') then. case when value = 2000 then 'Service1'. when value = 3000 then 'Service2'. end.
This edition of SQL Practice Problems assumes that you have some basic background knowledge about relational databases and tables. However, I’ve added some beginner level questions to gradually introduce the various parts of the SQL Select statement for those with less experience in SQL.
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.
28 maj 2024 · We can use either a CASE statement or an IIF() function to implement IF-THEN logic in SQL. In this tutorial, we’ll explore how to implement IF-THEN logic in SQL across various dialects such as SQL Server, MySQL, and PostgreSQL.
7 lip 2024 · What is a SQL CASE WHEN Statement? Understanding the SQL CASE WHEN statement is vital for effectively managing conditional logic within your SQL queries. This versatile construct lets you...
16 sty 2024 · In this article, you'll find real-world practical exercises using the CASE WHEN statement for data analysis. This statement enables analysts to craft customized logic for classification and decision-making in their queries. As a result, the query’s accuracy and the analysis’ depth is enhanced.
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.
