Doctrine_manual-1-2-en

Chapter 9: DQL (Doctrine Query Language) 127
$q = Doctrine_Query::create()
->select('u.id, COUNT(t.id) AS num_threads')
->from('User u, u.Threads t')
->where('u.id = ?', 1)
->groupBy('u.id');
echo $q->getSqlQuery();
The above call to getSql() would output the following SQL query:
SELECT
u.id AS u__id,
COUNT(f.id) AS f__0
FROM user u
LEFT JOIN forum__thread f ON u.id = f.user_id
WHERE u.id = ?
GROUP BY u.id
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Now execute the query and inspect the results:
// test.php
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// ...
$users = $q->execute();
You can easily access the num_threads data with the following code:
// test.php
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// ...
echo $users->num_threads . ' threads found';
UPDATE queries
UPDATE statement syntax:
UPDATE
SET = ,
=
WHERE
ORDER BY
LIMIT
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• The UPDATE statement updates columns of existing records in component_name
with new values and returns the number of affected records.
• The SET clause indicates which columns to modify and the values they should be
given.
• The optional WHERE clause specifies the conditions that identify which records to
update. Without WHERE clause, all records are updated.
• The optional ORDER BY clause specifies the order in which the records are being
updated.
• The LIMIT clause places a limit on the number of records that can be updated. You
can use LIMIT row_count to restrict the scope of the UPDATE. A LIMIT clause is a
rows-matched restriction not a rows-changed restriction. The statement stops as
soon as it has found record_count rows that satisfy the WHERE clause, whether or
not they actually were changed.
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