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15 wrz 2008 · Once you figure out how it works, you can convert three results to two results by deciding the behavior of null. E.g. this would treat null as not saleable: SELECT CASE WHEN obsolete = 'N' OR instock = 'Y' THEN 'true' ELSE 'false' -- either false or null END AS saleable. Share.
28 maj 2024 · In this article, we explored different options for executing IF-THEN logic in a SQL SELECT statement. These options include using CASE , IIF() , and CHOOSE() . Furthermore, if we want a query that’s used in almost every dialect, we must choose the CASE statement.
23 lis 2012 · select if(column_name = "value", "value_1", "value_2") as column_name from table_name; or. select (case when column_name = "value" then 'value_1' else 'value_2' end) as column_name from table_name;
30 paź 2023 · In this tutorial, we will explore the magic of using SQL if statement in SELECT within your database queries. This technique is like a superpower that allows us to adjust and tailor the information we get from a database based on specific conditions or rules we set.
7 mar 2022 · In this article, we will explain how to use the CASE expression in SELECT SQL statements. We will also explain how to use an alternative approach with an IF clause for MySQL. Prerequisites
26 wrz 2023 · The IF...THEN statement in SQL is often used in conjunction with the CASE expression. The basic syntax goes like this: SELECT . column1, column2, ... CASE WHEN condition1 THEN result1. WHEN condition2 THEN result2. ... ELSE else_result. END AS alias_name. FROM . your_table; column1, column2, etc.:
20 gru 2013 · SELECT CASE 1 WHEN 2 THEN 'Prawda' END. Czasami zachodzi potrzeba zwrócenia czegoś innego w przypadku niezgodności warunku. W takim przypadku, korzystając z bardziej standardowego języka zapytań piszemy coś na kształt IF {A} THEN {B} ELSE {C}.
