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AskSQLTeam
Ask SQLTeam Question
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 Posted - 2005-01-06 : 08:37:05
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| Hari writes "I want to update a column that is having NULL values. Value for this column is obtained from another table. I would like to update this coulmn only if the returned value is non NULL. If the returned value is NULL, I don't want to update NULL column again with a NULL. What will be the SQL for this.update person aset a.age=(SELECT b.age FROM person_age b WHERE a.id = b.id)where a.age is null This SQL will update person even if the return value is NULL." |
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spirit1
Cybernetic Yak Master
11752 Posts |
Posted - 2005-01-06 : 08:39:15
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will this do?update person aset a.age=(SELECT b.age FROM person_age b WHERE a.id = b.id and b.age is not null)where a.age is nullGo with the flow & have fun! Else fight the flow  |
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SQL for update