Sample:
Before
ID A B C D
100 NULL Bravo NULL Delta
100 Alpha Null Charlie Delta
101 Echo Null Golf Null
102 Null Fox Golf Null
After
ID A B C D
100 Alpha Bravo Charlie Delta
101 Echo Null Golf Null
102 Null Fox Golf Null
We already solve this but The query takes time to fetch when using STRING_AGG() or other functions.
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