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3 wrz 2024 · CASE can be used in any statement or clause that allows a valid expression. For example, you can use CASE in statements such as SELECT, UPDATE, DELETE and SET, and in clauses such as <select_list>, IN, WHERE, ORDER BY, and HAVING. Transact-SQL syntax conventions.
27 lip 2010 · As soon as a WHEN statement is true the break is implicit. You will have to concider which WHEN Expression is the most likely to happen. If you put that WHEN at the end of a long list of WHEN statements, your sql is likely to be slower. So put it up front as the first.
Learn how to use the SQL CASE expression to check conditions and return values like an if-then-else statement. See syntax, examples and a demo database.
28 lut 2023 · CASE w SQL możemy wykonać na dwa sposoby. Poniżej przedstawiam schematy działania instrukcji. Pierwsza konstrukcja CASE polega na przypisaniu wyniku do wartości. CASE wartość_lub_nazwa_kolumny. WHEN wartość_1 THEN wynik_1 . WHEN wartość_2 THEN wynik_2 . WHEN wartość_n THEN wynik_n . [ ELSE wynik_gdy_zaden_z_warunków_nie_jest_spełniony ] END.
20 kwi 2021 · Learn how to use the CASE expression to evaluate conditions and return expressions in T-SQL statements. See syntax, examples and alternatives for searched and simple CASE, and IIF function.
28 cze 2024 · Możemy używać CASE wewnątrz CASE w SQL. Poniżej znajduje się przykładowy kod MS-SQL DECLARE @Flight_Ticket int; SET @Flight_Ticket = 250; SELECT CASE WHEN @Flight_Ticket >= 400 THEN 'Visit Nearby Tourist Location.'
26 cze 2023 · The SQL CASE statement specifies a conditional expression to perform different actions depending on the input expression value. The syntax for the CASE statement in a SQL database is: CASE expression. WHEN value1 THEN result1. WHEN value2 THEN result2. ... WHEN valueN THEN resultN. ELSE defaultValue. END.
