SELECT address,job_title,education,SUM(recruiting) FROM commerce_jobs WHERE education = '大专' and ( job_title LIKE '%主管%' OR job_title LIKE '%组长%' OR job_title LIKE '%主任%' OR job_title LIKE '%项目经理%' )
标红部分的() 括号。and 比 or具有更高的优先级,所以不加括号他就从左到右开始判断
优先级 运算符 (最高) !-(负号),~(按位取反)^(按位异或)*,/(DIV),%(MOD)+,->>,<<&|=(比较运算),<=>,<,<=,>,>=,!=,<>,IN,IS NULL,LIKE,REGEXPBETWEEN AND,CASE,WHEN,THEN,ELSENOT&&,ANDXOR||,OR (最低) =(赋值运算),:=