Friday, January 15, 2021

How do I UPDATE from a SELECT in SQL Server?

 In SQL Server, it is possible to insert rows into a table with an INSERT.. SELECT statement:

UPDATE
    Table_A
SET
    Table_A.col1 = Table_B.col1,
    Table_A.col2 = Table_B.col2
FROM
    Some_Table AS Table_A
    INNER JOIN Other_Table AS Table_B
        ON Table_A.id = Table_B.id
WHERE
    Table_A.col3 = 'cool'

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