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Editorial Team
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Asked: 2026-05-22T22:08:45+00:00

How can I do that in a optimal way? TABLE ID FLAG VALUE —————————-

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How can I do that in a optimal way?

TABLE 

ID FLAG VALUE
----------------------------
1   Y   52
1   N   NULL
2   Y   51
3   N   54

OUTPUT 

ID FLAG VALUE
----------------------------
1   Y   52
1   N   52
2   Y   51
3   N   54
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1 Answer

  1. Editorial Team
    UPDATE 
  theTable
SET 
  value = (SELECT MAX(value) FROM theTable i WHERE i.id = theTable.id)
WHERE
  value IS NULL
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