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? ??? ??? MySQL ???? ?? ??? ???? ?? MySQL DELETE ??? ?? ??? ???? ???? ??? ??????

?? ??? ???? ?? MySQL DELETE ??? ?? ??? ???? ???? ??? ??????

Jan 10, 2025 pm 06:01 PM

How to Correctly Use Subqueries in MySQL DELETE Statements to Avoid Syntax Errors?

?? ??? ???? ???? MySQL DELETE ?

MySQL?? DELETE ?? ???? ??? ??? ?? ????? ?? ??? ? ????. ???? ??? ?? ??? ???? ??? ???? ????. ??? ? ??? ????? ? ? ?? ??? ???? ????? ? ????.

???? ?? ??? ???? term_hierarchy ????? ?? ????? ????.

DELETE FROM term_hierarchy AS th
WHERE th.parent = 1015 AND th.tid IN (
    SELECT DISTINCT(th1.tid)
    FROM term_hierarchy AS th1
    INNER JOIN term_hierarchy AS th2 ON (th1.tid = th2.tid AND th2.parent != 1015)
    WHERE th1.parent = 1015
);

??? ?? ?? ?? ??? ??????.

<code>You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'AS th
WHERE th.parent = 1015 AND th.tid IN (
  SELECT DISTINCT(th1.tid)
  FROM ter' at line 1</code>

??? ??? MySQL? ?? ?????. ???? ???(? ?? term_hierarchy)? ??? ?? ???? ??? ? ????. ??? ???? ?? DELETE ??? ??? ?? ??? ??? ? ????.

???:

? ?? ??? ????? ??? ???? ???? ?? ?? ??? ???? ?? ?? ??? ??? ? ????. ?? ??? ??? ?? ?????.

DELETE e.*
FROM tableE e
WHERE id IN (SELECT id
             FROM (SELECT id
                   FROM tableE
                   WHERE arg = 1 AND foo = 'bar') x);

?? ??? ?? ?? ??(? ???? x?? ?)? ?????? MySQL? ?? ?? ??? ???? ?? ?? ??? ??? ? ????.

? ??? ?? ??? ???? ?? MySQL DELETE ??? ?? ??? ???? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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