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11 Ιουλ 2016 · In Oracle string literals need to be surrounded in single quotes. To find a sub-string match you can either use LIKE: SELECT ID, NAME, CASE WHEN Descr LIKE '%Test%' THEN 'Contains Test'. WHEN Descr LIKE '%Other%' THEN 'Contains Other'. ELSE 'No Match'.
Oracle CASE expression allows you to add if-else logic to SQL statements without having to call a procedure. The CASE expression evaluates a list of conditions and returns one of the multiple possible results.
Is there a "better" way to rewrite a SELECT clause where multiple columns use the same CASE WHEN conditions so that the conditions are only checked once? See the example below.
7 Δεκ 2023 · How to use CASE for IF-THEN logic in SQL SELECT. If you want to see the grade for each exam, select the case expression like a regular column: It’s a good idea to give the expression an alias. This is particularly important if the case is in a subquery.
7 Ιουν 2016 · The advantage would be that you can change the data in the table easier than changing all of the queries that have that case statement. Share Improve this answer
A CASE expression evaluates a list of conditions and returns one of multiple possible result expressions. The result of a CASE expression is a single value whereas the result of a CASE statement is the execution of a sequence of statements.
The CASE statement evaluates a single expression and compares it against several potential values, or evaluates multiple Boolean expressions and chooses the first one that is TRUE. Syntax. searched_case_statement ::=. [ <<label_name>> ] CASE { WHEN boolean_expression THEN {statement;} ...
