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zYne 2007-08-11 18:12:30 +00:00
parent 2f85c85cf7
commit e5c02c2171
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manual/new/docs/en/dql-doctrine-query-language/conditional-expressions.txt
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@ -158,17 +158,17 @@ The NOT EXISTS operator returns TRUE if the subquery returns 0 rows and FALSE ot
Finding all articles which have readers: Finding all articles which have readers:
<code> <code>
FROM Article FROM Article a
WHERE EXISTS (FROM ReaderLog(id) WHERE EXISTS (SELECT r.id FROM ReaderLog r
WHERE ReaderLog.article_id = Article.id) WHERE r.article_id = a.id)
</code> </code>
Finding all articles which don't have readers: Finding all articles which don't have readers:
<code> <code>
FROM Article FROM Article a
WHERE NOT EXISTS (FROM ReaderLog(id) WHERE NOT EXISTS (SELECT r.id FROM ReaderLog r
WHERE ReaderLog.article_id = Article.id) WHERE r.article_id = a.id)
</code> </code>