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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
searched-when-clause. Specifies a search-condition that is...
- Db2 12 - Db2 SQL - CASE statement - IBM
Use a searched case statement WHEN clause to update column...
- Db2 12 - Db2 SQL - CASE expressions - IBM
24 cze 2019 · You may use the following syntax trick: CASE WHEN 'Value' IN (TB1.ColumnX, TB1.ColumnY, TB1.ColumnZ) THEN Statement1 ELSE ' ' END AS MyColumn. The alternative to this would be to repeat the full equality check for each column: SELECT. CASE. WHEN TB1.ColumnX = 'Value' OR. TB1.ColumnY = 'Value' OR. TB1.ColumnZ = 'Value'.
searched-when-clause. Specifies a search-condition that is applied to each row or group of table data presented for evaluation, and the result when that condition is true. Pair-wise comparison is performed. Implicit cast of each pair follows the same rule as for a basic predicate.
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.
Use a searched case statement WHEN clause to update column DEPTNAME in table DEPT, depending on the value of SQL variable . The CASE statement selects an execution path based on multiple conditions. A CASE statement operates in the same way as a CASE expression.
DB2 - SQL Case Statement. 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.
11 lut 2016 · You cannot use the CASE expression in DB2 this way. The result of a CASE expression cannot be a boolean value. Your WHERE clause might look something like this, if one were to blindly translate your code: WHERE. COUNTRY_CD = '81930' AND. LANG_CD = '02' AND (. ( PARM_ADTR_ID = 'ALL'.
