SQL Replace NULL Values with Own text
I've decided to do it differently since I wasn't going anywhere with the above SQL. I'll appreciate if anyone has suggestions to make for the above SQL with the set constraints.
SELECT band.name AS Band_Name, 'NULL' AS Keyboard_PlayerFROM memberofINNER JOIN memberON memberof.mid = member.mid FULL JOIN bandON memberof.bid = band.bid AND instrument = 'keyboards'WHERE member.name IS NULL UNIONSELECT band.name AS Band_Name, member.name AS Keyboard_PlayerFROM memberofINNER JOIN memberON memberof.mid = member.mid FULL JOIN bandON memberof.bid = band.bid WHERE instrument = 'keyboards'
As per your comment to replace empty string to some text, the simple solution is to use case statement like below.
SELECT BAND.NAME AS Band_Name, CASE WHEN KBPLAYER.NAME = '' THEN 'No Player' ELSE KBPLAYER.NAME END AS Keyboard_PlayerFROM BANDFULL OUTER JOIN ( SELECT M.NAME, MO.BID FROM MEMBEROF MO, MEMBER M WHERE MO.INSTRUMENT='keyboards' AND M.MID=MO.MID ) KBPLAYERON BAND.BID=KBPLAYER.BIDORDER BY BAND.NAME, KBPLAYER.NAME