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15 wrz 2008 · See working demo: if then without case in SQL Server. For start, you need to work out the value of true and false for selected conditions. Here comes two NULLIF: for true: ISNULL(NULLIF(p.[Instock], 'Y'), 1) for false: ISNULL(NULLIF(p.[Instock], 'N'), 0) combined together gives 1 or 0. Next use bitwise operators. It's the most WYSIWYG method.
Lets say for instance I have two columns A & B. Column A contains numbers 1 - 10. Column B contains Months Jan - Oct. I need help writing logic that looks at column B and returns the value in column A that is 2 months prior. Say for instance Column B is March, I'd like to return the value for January.
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 gru 2023 · If you want to do if-else-then logic in select, where or anywhere else in a statement, you need a case expression. This is a series of when clauses that the database runs in order: For example, if you want to map exam correct percentages to grade letters according to these rules:
30 paź 2023 · We will guide you through five effective methods such as the CASE statement, IIF function, WHERE clause with OR/AND, CHOOSE function, and COALESCE function. These methods are like different paths to reach the same destination - making your SQL queries smart and responsive to conditions.
2 cze 2023 · SQL CASE Statement Syntax. The syntax of the SQL CASE expression is: CASE [expression] WHEN condition_1 THEN result_1 WHEN condition_2 THEN result_2 ... WHEN condition_n THEN result_n ELSE result END case_name. The CASE statement can be written in a few ways, so let’s take a look at these parameters.
24 lip 2019 · If you are using SQL Server 2016 or above and you want to use a string of separated values as input, you can use the table valued function STRING_SPLIT(). This function splits a string into rows based on a specified separator and returns the data in a table.
