Working with SQL statements for DB2
Is there a way to create the following in the SQL statements for DB2?
1. Outer joins in a select statement
2. NVL conditions in triggers
1. iSeries doesn't support full outer joins (just right & left outer joins) but they can be simulated. Here's an example:
SELECT EMPNO, LASTNAME, PROJNO FROM CORPDATA.EMPLOYEE LEFT OUTER JOIN CORPDATA.PROJECT ON EMPNO = RESPEMP WHERE LASTNAME > 'S' UNION (SELECT EMPNO, LASTNAME, PROJNO FROM CORPDATA.PROJECT EXCEPTION JOIN CORPDATA.EMPLOYEE ON EMPNO = RESPEMP WHERE LASTNAME > 'S')
2. Not sure what you mean by NVL in Triggers. If you're referring to the Oracle NVL function, then the DB2 Coalesce function is what you'd want to use in your trigger logic.
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