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                ## 查詢數據 建議使用: ~~~ Db::name('user')->where('id',1)->find(); Db::name('user')->where('status',1)->select(); ~~~ ## 擴展 1,原生查詢方法: ~~~ $result = Db::query('select * from think_data where id = 5'); dump($result); ~~~ 2,基本單條查詢 ~~~ // table方法必須指定完整的數據表名 Db::table('think_user')->where('id',1)->find(); ~~~ 3,基本多條查詢 `Db::table('think_user')->where('status',1)->select();` 如果設置了數據表前綴參數的話,可以使用 ~~~ Db::name('user')->where('id',1)->find(); Db::name('user')->where('status',1)->select(); ~~~ 4,助手函數 ~~~ db('user')->where('id',1)->find(); db('user')->where('status',1)->select(); ~~~ 5,使用Query對象或閉包查詢 ~~~ //閉包對象 $query = new \think\db\Query(); $query->table('think_user')->where('status',1); Db::find($query); Db::select($query); //閉包函數 Db::select(function($query){ $query->table('think_user')->where('status',1); }); ~~~ 6,值和列查詢 ~~~ // 返回某個字段的值(value 方法查詢結果不存在,返回 false) Db::table('think_user')->where('id',1)->value('name'); //查詢某一列 // 返回數組(column 方法查詢結果不存在,返回空數組) Db::table('think_user')->where('status',1)->column('name'); // 指定索引 Db::table('think_user')->where('status',1)->column('name','id'); ~~~ 7,數據集分批處理(小項目基本用不到,先知道有這個功能吧)
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