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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'.
CASE WHEN c1=var1 OR (c1 IS NULL AND var1 IS NULL) THEN 'a' WHEN c1=var2 OR (c1 IS NULL AND var2 IS NULL) THEN 'b' ELSE NULL END. DECODE (c1,var1, 'a', var2, 'b') CASE expressions allow an expression to be selected based on the evaluation of one or more conditions.
To do this, you can simply use the CHAR () function: SELECT "Current Date -" || char (current date) FROM sysibm.sysdummy1; SELECT "Current Time -" || char (current time) FROM sysibm.sysdummy1; SELECT "Current Date with 12 hours -" char (current date + 10 hours) FROM sysibm.sysdummy1;
Db2 supports two kinds of CASE expressions: simple CASE and searched CASE expressions. Both simple and searched CASE are expressions, therefore, you can use them in any clause that accepts an expression such as SELECT , WHERE , GROUP BY , and HAVING clauses.
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.
Example 1: Use a simple case statement WHEN clause to update column DEPTNAME in table DEPT, depending on the value of SQL variable v_workdept. CASE v_workdept WHEN 'A00' THEN UPDATE DEPT SET DEPTNAME = 'DATA ACCESS 1'; WHEN 'B01' THEN UPDATE DEPT SET DEPTNAME = 'DATA ACCESS 2'; ELSE UPDATE DEPT SET DEPTNAME = 'DATA ACCESS 3'; END CASE
1 sty 2018 · select_list. FROM . table_name. WHERE . search_condition. ORDER BY . sort_expression; Code language: SQL (Structured Query Language) (sql) In this syntax, the search_condition like a filter that defines a condition for the returned rows. The rows that cause the search_condition evaluate to true will be included in the result set.
