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                FIND_IN_SET(str,strlist) str 要查詢的字符串 strlist 字段名 參數以”,”分隔 如 (1,2,6,8,10,22) 查詢字段(strlist)中包含(str)的結果,返回結果為null或記錄 假如字符串str在由N個子鏈組成的字符串列表strlist 中,則返回值的范圍在 1 到 N 之間。 一個字符串列表就是一個由一些被 ‘,' 符號分開的子鏈組成的字符串。如果第一個參數是一個常數字符串,而第二個是type SET列,則FIND\_IN\_SET() 函數被優化,使用比特計算。 如果str不在strlist 或strlist 為空字符串,則返回值為 0 。如任意一個參數為NULL,則返回值為 NULL。這個函數在第一個參數包含一個逗號(‘,')時將無法正常運行。 ![](https://img.kancloud.cn/26/cf/26cf35686310c7cc9798a189443080d1_326x121.png) `SELECT` `id,``name``,list` `from` `tb_test` `WHERE` `FIND_IN_SET(``'daodao'``,list);` 2.tp5 ~~~ $data=db('article')->where(['type'=>2,'status'=>1])->whereRaw('FIND_IN_SET(:id,theme_id)',['id'=>$param['theme_id']])->select(); ~~~
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