Doctrine_manual-1-2-en

Chapter 9: DQL (Doctrine Query Language) 142
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All and Any Expressions
Syntax:
operand comparison_operator ANY (subquery)
operand comparison_operator SOME (subquery)
operand comparison_operator ALL (subquery)
An ALL conditional expression returns true if the comparison operation is true for all values
in the result of the subquery or the result of the subquery is empty. An ALL conditional
expression is false if the result of the comparison is false for at least one row, and is unknown
if neither true nor false.
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$q = Doctrine_Query::create()
->from('C')
->where('C.col1 < ALL (FROM C2(col1))');
An ANY conditional expression returns true if the comparison operation is true for some value
in the result of the subquery. An ANY conditional expression is false if the result of the
subquery is empty or if the comparison operation is false for every value in the result of the
subquery, and is unknown if neither true nor false.
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$q = Doctrine_Query::create()
->from('C')
->where('C.col1 > ANY (FROM C2(col1))');
The keyword SOME is an alias for ANY.
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$q = Doctrine_Query::create()
->from('C')
->where('C.col1 > SOME (FROM C2(col1))');
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The comparison operators that can be used with ALL or ANY conditional expressions are =,
=, . The result of the subquery must be same type with the conditional
expression.
NOT IN is an alias for ALL. Thus, these two statements are equal:
FROM C
WHERE C.col1 ALL (
FROM C2(col1));
FROM C
WHERE C.col1 NOT IN (
FROM C2(col1));
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$q = Doctrine_Query::create()
->from('C')
->where('C.col1 ALL (FROM C2(col1))');
$q = Doctrine_Query::create()
->from('C')
->where('C.col1 NOT IN (FROM C2(col1))');
Subqueries
A subquery can contain any of the keywords or clauses that an ordinary SELECT query can
contain.
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