> 當我們的查詢添加越來越復雜的時候，簡單的結構已經無法滿足我們的需要，這時候我們就會需要一個完整的SQL語句構造，當然，我們考慮到了這些并做了一些調整 ```php //IN查詢 $select = Db('user')->select([ 'field' => ['username', 'email'], //設定查詢的字段 'where' => [ //定義查詢的條件 'id' => array('in','1,6,8,9,10') ], 'limit' => '0, 10', //條數限制 'orderby' => 'username asc', //進行排序 ])->get(); //sql：SELECT `username`,`email` FROM `user` WHERE `id` IN (1,6,8,9,10) ORDER BY username asc LIMIT 0,10 //like查詢 $select = Db('user')->select([ 'field' => ['username', 'email'], //設定查詢的字段 'where' => [ //定義查詢的條件 'username' => array('like','%張') ], 'limit' => '0, 10', //條數限制 'orderby' => 'username asc', //進行排序 ])->get(); //sql：SELECT `username`,`email` FROM `user` WHERE `username` LIKE '%張' ORDER BY username asc LIMIT 0,10 //自定義操作(獲取所有周六注冊的用戶) $select = Db('user')->select([ 'field' => ['username', 'email'], //設定查詢的字段 'where' => [ //定義查詢的條件 '' => array('string',"FROM_UNIXTIME(add_time,'%w')=6") ], 'limit' => '0, 10', //條數限制 'orderby' => 'username asc', //進行排序 ])->get(); //sql：SELECT `username`,`email` FROM `user` WHERE FROM_UNIXTIME(add_time,'%w')=6 ORDER BY username asc LIMIT 0,10 ```