How to debug in sql(Oracle) -

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i writing long sql query , i'm getting incorrect output fields. how debug query?

there no right answer question. think deep down know that.

when have complicated break down uncomplicated pieces. once comfortable these pieces 1 one start put complicated thing again. main point keep breaking complicated things more , more simple things. not embarrassed have broken things down select sysdate dual , start build up!

good luck.


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