Hey Rich, I put a DUMP around your 2nd statement, so it looks like this: SELECT dump(LISTAGG(col2,',') WITHIN GROUP (ORDER BY 1)) FROM tester; and the result was Typ=1 Len=18: 0,116,0,119,0,111,0,32,0,98,0,121,0,116,0,101,0,115 I think it's that Zero in the first spot that's making Toad think it's a null. Not sure if we'll be able to do anything about that...
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