sql update case when null的相關文章
sql server - UPDATE if column is not null, if null then leave at null ...

sql server - UPDATE if column is not null, if null then leave at null ...

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日期:2025-06-13
update tableA set first_name = case when first_name is null then null else 'aaa' end, last_name = case when last_name is null then null else ......看更多