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In general, the value of the case-expression is the value of the result-expression following the first (leftmost) case that evaluates to true. If no case evaluates to true and the ELSE keyword is present then the result is the value of the result-expression or NULL.
- Db2 12 - Db2 SQL - CASE expressions - IBM
Specifies the value that follows the THEN and ELSE keywords....
- Db2 12 - Db2 SQL - CASE statement - IBM
The CASE statement selects an execution path based on the...
- Db2 12 - Db2 SQL - CASE expressions - IBM
Introduction to Db2 CASE expression. A CASE expression allows you to select an expression based on evaluation of one or more conditions. In other words, it allows you to add the if-else logic to your queries. Db2 supports two kinds of CASE expressions: simple CASE and searched CASE expressions. Both simple and searched CASE are expressions ...
Specifies the value that follows the THEN and ELSE keywords. It specifies the result of a searched-when-clause or a simple-when-clause that is true, or the result if no case is true. There must be at least one result-expression in the CASE expression with a defined data type. NULL cannot be specified for every case.
The CASE statement selects an execution path based on the evaluation of one or more conditions. A CASE statement operates in the same way as a CASE expression. Syntax
3 lis 2011 · It works by ensuring you do the higher values first and limit what rows get affected in the where clause. If you feel you must use a case statement: case when royalty >= 0.16 then royalty * 1.2. case when royalty >= 0.11 and royalty < 0.16 then royalty * 1.2. case when royalty < 0.11 then royalty * 1.1. end;
The CASE statement goes through conditions and returns a value when the first condition is met (like an COBOL Evaluate statement). So, If a condition is true, it will stop reading and return the result. If no conditions are true, it returns the value in the ELSE clause.
The CASE statement selects an execution path based on multiple conditions. A CASE statement operates in the same way as a CASE expression.
