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Zend_Db_Select對象參加所以Zend_Db_Select對象所擁有的方法使用3個或多個表
`joinUsing(table, join, [columns]) and joinInnerUsing(table, join, [columns])`
`joinLeftUsing(table, join, [columns])`
`joinRightUsing(table, join, [columns])`
`joinFullUsing(table, join, [columns])`
等
,但如果你想加入3個或多個表(例如,對於多對多關聯)什麼? .eg:此查詢:
SELECT * FROM (j LEFT JOIN e ON j.id = e.eee) LEFT JOIN w ON w.www = e.id
你會怎樣跟Zend_Db_Select對象