CODEWITHSUNDEEP
sqlitejoinsql-update
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Reputation: 596783

How do I make an UPDATE while joining tables on SQLite?

I tried :

UPDATE closure JOIN item ON ( item_id = id ) 
SET checked = 0 
WHERE ancestor_id = 1

And:

UPDATE closure, item 
SET checked = 0 
WHERE ancestor_id = 1 AND item_id = id

Both works with MySQL, but those give me a syntax error in SQLite.

How can I make this UPDATE / JOIN works with SQLite version 3.5.9 ?

Upvotes: 95

Views: 56988

Answers (2)

Roman Nazarevych
Roman Nazarevych

Reputation: 7703

You can also use REPLACE then you can use selection with joins. Like this:

REPLACE INTO closure 
 SELECT sel.col1,sel.col2,....,sel.checked --checked should correspond to column that you want to change
FROM (
 SELECT *,0 as checked FROM closure LEFT JOIN item ON (item_id = id) 
 WHERE ancestor_id = 1) sel

Upvotes: 6

Andrew Watt
Andrew Watt

Reputation: 2767

You can't. SQLite doesn't support JOINs in UPDATE statements.

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);

Or something like that; it's not clear exactly what your schema is.

Upvotes: 130

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