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Using sub query for doubletts

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Using sub query for doubletts

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Tips

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active record, cdbcriteria, subquery, doubletts

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at first find doubletts by db fields:
 
find doubletts by db fields.
 
in this example i will check doublets for 3 tabelfields (col1,col2,col3).
 
so i will get a subquery with the condition, select and grouping of the tablefields. the having with COUNT(<colname>) > 1 means: find all records more then one result.

```php
[...]
get the subquery:
the subquery is a part of the query i need.

```php
[...]
the "real" criteria with the subquery. you can add some criteria you need..
 
important: the number of col and the result of the subquery must be the same size! add the subquery condition and order by tablefields:


```php
$mainCriteria=new CDbCriteria();
$mainCriteria->condition=' (col1,col2,col3) in ('.$subQuery.') ';
[...]
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Version: 1.1
Category: Tips
Tags: active record, cdbcriteria, doubletts, subquery
Written by: mb
Last updated by: mb
Created on: Aug 7, 2012
Last updated: 11 years ago
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