sqlsql-servert-sqlsql-updatedml

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:

INSERT INTO Table (col1, col2, col3)
SELECT col1, col2, col3 
FROM other_table 
WHERE sql = 'cool'

Is it also possible to update a table with SELECT? I have a temporary table containing the values and would like to update another table using those values. Perhaps something like this:

UPDATE Table SET col1, col2
SELECT col1, col2 
FROM other_table 
WHERE sql = 'cool'
WHERE Table.id = other_table.id

Solution

  • 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'