pg 或者Oracle計算字段含有某個字符個數

建立測試表，添加測試數據 1 PG create table pgtest as select ‘mm,lll,kkk’ as testweb 2 oracle create table oracletest as select ‘mm,lll,kkk’ as test from dualoracle 計算元素個數（既逗號個數） select length(translate(test,’,’||

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