在zend中选择left

Question

如何在zend中执行此类操作：

SELECT LEFT(log_browser, LOCATE(' ', log_browser)) AS browser, COUNT(*) AS amount
FROM logs
GROUP BY LEFT(log_browser, LOCATE(' ', log_browser))

Answer 1

尝试：     $ select-＆gt; from（$ name，$ column） - ＆gt; group（）

$select->from("logs", array("LEFT(log_browser, LOCATE(' ', log_browser))" => "browser" ,"count(*)" => "amount"))
       ->group(array("LEFT(log_browser, LOCATE(' ', log_browser)");

更多信息如何运作 http://framework.zend.com/manual/1.12/en/zend.db.select.html#zend.db.select.building.group

DINS

Answer 2

对表达式语句使用Zend_Db_Expr类：

$browserExpr = new Zend_Db_Expr('LEFT(log_browser, LOCATE(" ", log_browser))');
$select->from("logs", array('browser' => $browserExpr))->group($browserExpr);