Sql server update multiple columns from another table

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情歌与酒
情歌与酒 2021-02-19 17:57

I have read lots of post about how to update multiple columns but still can\'t find right answer.

I have one table and I would like update this table from another table.

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  • 2021-02-19 18:13

    TSQL does not support row-value constructor. Use this instead:

    UPDATE table1 
    SET a = t2.a,
        b = t2.b,
        (...)
    FROM 
    (
    SELECT ..... with join ... WHERE .... 
    ) t2
    WHERE table1.id = table2.id
    
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  • 2021-02-19 18:14

    The above solution will work only for MSSQL. In case of MySql you just need to first declare the tables

    UPDATE 
          table1 t1 ,table2 t2 
    set 
          t1.field=t2.field 
    where 
          t1.id=t2.id;
    

    In my case this worked..!!

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  • 2021-02-19 18:19

    You don't need to use a sub-query you can also simply do the following....

    Update t1 
    set t1.a  = t2.a
       ,t1.b  = t2.b
       ,t1.c  = t2.c
       ,t1.d  = t2.d
       .......
    from table1 t1
    JOIN table2 t2  ON t1.id = t2.id
    WHERE .......
    
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  • 2021-02-19 18:33

    The UPDATE SET commands implicitly apply on the table specified by , and it is not possible to specify the table on the SET operation.

    Edit: Specify only the column name you want to update, do not mention the table.

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