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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.
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.
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.
23 Αυγ 2024 · Multiple CASE WHEN statements allow you to implement conditional logic in SQL queries, allowing for the evaluation of multiple conditions and the execution of different actions based on those conditions. Here is the basic syntax of a Multiple CASE WHEN statement:
27 Απρ 2004 · Here is the basic syntax of an Oracle CASE When statement: case when <condition> then <value> when <condition> then <value> ... else <value> end. Examples. The following examples will make the use of CASE expression more clear, using Oracle CASE select statements. E.g.: Returning categories based on the salary of the employee.
In a simple CASE expression, Oracle Database searches for the first WHEN... THEN pair for which expr is equal to comparison_expr and returns return_expr. If none of the WHEN... THEN pairs meet this condition, and an ELSE clause exists, then Oracle returns else_expr. Otherwise, Oracle returns null.
