如何通过将表与其他 5 个表连接来更新表中的列？

Question

I want to update a table which has only two fields test_set_id and plan_id which i can get easily from this query

SELECT      tp.plan_id
        ,   r.release_id
FROM        test_plan tp
        ,   releases r
        ,   test_run tr
        ,   iteration i
WHERE       tr.iteration_id = i.iteration_id
AND         i.release_id    = r.release_id
AND         tr.plan_id      = tp.plan_id
AND         i.release_id    = 1
GROUP BY    plan_id

but when I run the following query, it is giving me an sql error.

UPDATE  test_set_relation
SET     test_set_id
    ,   plan_id=
        (   SELECT      tp.plan_id
                    ,   r.release_id
            FROM        test_plan tp
                    ,   releases r
                    ,   test_run tr
                    ,   iteration i
            WHERE       tr.iteration_id = i.iteration_id
            AND         i.release_id    = r.release_id
            AND         tr.plan_id      = tp.plan_id
            AND         i.release_id    = 1
            GROUP BY    plan_id
        )

How do I fix this issue?

Answer 1

You cannot assign multiple field values like that in SET.

SET test_set_id,plan_id=(SELECT tp.plan_id,r.release_id

This will throw the error Incorrect syntax near ','. (this error message is from SQL Server) because the query is expected to have an assignment operator = next to the column name.

Your query should be formulated something along this line. Without knowing how your tables are structured, it is not possible to formulate a valid UPDATE statement.

Usage : SQL Server syntax

UPDATE      t1
SET         t1.col2 = t2.col2
        ,   t1.col3 = t2.col3
FROM        table1 t1
INNER JOIN  table2 t2
ON          t1.col1 = t2.col1

Usage : MySQL syntax

UPDATE      table t1
JOIN
SET         t1.col2 = t2.col2
        ,   t1.col3 = t2.col3
INNER JOIN  table2 t2
ON          t1.col1 = t2.col1