24 lines
669 B
PHP
24 lines
669 B
PHP
Syntax:
|
|
<code>
|
|
<operand> IN (<subquery>|<value list>)
|
|
</code>
|
|
An IN conditional expression returns true if the //operand// is found from result of the //subquery//
|
|
or if its in the specificied comma separated //value list//, hence the IN expression is always false if the result of the subquery
|
|
is empty.
|
|
|
|
When //value list// is being used there must be at least one element in that list.
|
|
|
|
<code>
|
|
FROM C1 WHERE C1.col1 IN (FROM C2(col1));
|
|
|
|
FROM User WHERE User.id IN (1,3,4,5)
|
|
</code>
|
|
|
|
The keyword IN is an alias for = ANY. Thus, these two statements are equal:
|
|
<code>
|
|
FROM C1 WHERE C1.col1 = ANY (FROM C2(col1));
|
|
FROM C1 WHERE C1.col1 IN (FROM C2(col1));
|
|
</code>
|
|
|
|
|