Zend从多个表中选择特定的列集

Question

给出一个查询：

SELECT t1.c1, t2.c1 FROM t1,t2; 

如何在不使用连接的情况下在Zend框架中编写它？

Answer 1

在zend框架中尝试以下连接查询，

    $sql = $this->tableGateway->getSql()->select();

    $sql->join('table2', "table1.column1 = table2.column1", array(column1,column2), 'inner');

Answer 2

假设您有一个公共字段（我们称之为c2），您可以执行近似JOIN的操作而不会实际执行JOIN。

// we'll assume $adapter is an instance of Zend_Db_Adapter_Mysqli

$cols = $adapter->fetchAll(
    '
        SELECT
            t1.c1 AS t1c1,
            t2.c1 AS t2c1
        FROM t1, t2
        WHERE t1.c2 = t2.c2
    '
);

使用Zend_Db_Select你可以这样做

$rows = $adapter->select()
    ->from('t1', array('t1c1' => 'c1'))
    ->from('t2', array('t2c1' => 'c1'))
    ->where('t1.c2 = t2.c2')
    ->query()->fetchAll();