我试过了:
UPDATE closure JOIN item ON ( item_id = id )
SET checked = 0
WHERE ancestor_id = 1
还有:
UPDATE closure, item
SET checked = 0
WHERE ancestor_id = 1 AND item_id = id
两者都适用于 MySQL,但它们在 SQLite 中给了我一个语法错误.
Both works with MySQL, but those give me a syntax error in SQLite.
如何使此 UPDATE/JOIN 与 SQLite 3.5.9 版一起使用?
How can I make this UPDATE / JOIN works with SQLite version 3.5.9 ?
你不能.SQLite 不支持 UPDATE 语句中的 JOIN.
You can't. SQLite doesn't support JOINs in UPDATE statements.
但是,您可以使用子查询来代替:
But, you can probably do this with a subquery instead:
UPDATE closure SET checked = 0
WHERE item_id IN (SELECT id FROM item WHERE ancestor_id = 1);
或者类似的东西;目前尚不清楚您的架构究竟是什么.
Or something like that; it's not clear exactly what your schema is.
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