Question

我有一个类似下面的SQL查询，我想在Zend Framework 2中创建它。

（SELECT id AS id FROM exp_personal_data ORDER BY town）UNION（SELECT id AS id FROM pd_unregister）

我想加入工会并加入此LIMIT，ORDER BY等。

$ this-＆gt; _select-＆gt; combine（$ selectPdContest，'union all'）;

当我写这样的查询时。

$ this-＆gt; _select-＆gt; combine（$ selectPdContest，'union all'） - ＆gt; limit（'10）;

查询如下所示：

（SELECT id AS id FROM exp_personal_data ORDER BY town LIMIT 10）UNION（SELECT id AS id FROM pd_unregister）

限制仅添加到第一个选择。我想要像这样添加限制。

（SELECT id AS id FROM exp_personal_data ORDER BY town）UNION（SELECT id AS id FROM pd_unregister）LIMIT 10

如何在Zend框架2中创建它？

Answer 1

解决方案1（简单）：

    $adapter = $this->tableGateway->getAdapter();
    $resultSet = $adapter->query("(SELECT user_id AS id FROM user ORDER BY id)  UNION  (SELECT account_id AS id FROM account) LIMIT 10",$adapter::QUERY_MODE_EXECUTE);
    print_r($resultSet->toArray());die;

解决方案2（复杂）：

use Zend\Db\Sql\Sql;
use Zend\Db\Sql\Select;

//sql query first part
$adapter = $this->tableGateway->getAdapter();//the db connection adapter
$select = new Select('user');
$select->columns(array('id' => 'user_id'));
$select->order('id');
$sql = new Sql($adapter);
$statement = $sql->getSqlStringForSqlObject($select);

//sql query second part         
$select2 = new Select('account');
$select2->columns(array('id' => 'account_id'));
$sql = new Sql($adapter);
$statement2 = $sql->getSqlStringForSqlObject($select2);

//combine the two statements into one        
$unionQuery = sprintf('%s UNION %s','('.$statement = $sql->getSqlStringForSqlObject($select).')',
'('.$statement2 = $sql->getSqlStringForSqlObject($select2).') LIMIT 10'); 

//execute the union query 
$resultSet = $adapter->query( $unionQuery, $adapter::QUERY_MODE_EXECUTE);

print_r($resultSet->toArray());die;

Answer 2

添加这些行将起作用，

$ select1 = new Select（）; $ select1-＆gt; combine（$ selectPdContest，'union all'）;

$ select3 = new Select（）; $ oneTwo = $ select3-＆gt; from（['sub'=＆gt; $ select1]） - ＆gt; limit（10）;

ZEND 2.联盟。添加限制到UNION查询

2 个答案: