我一直以为SQL先执行SELECT语句？一个窗口函数，我突然发现错了
复制SELECT CONCAT(first_name,直为执行 , last_name) AS full_name, count(*) FROMtable GROUPBY full_name 1.2.3.
复制SELECT CONCAT(first_name,直为执行 , last_name) AS full_name, count(*) FROMtable GROUPBY full_name 1.2.3.
复制SELECT CONCAT(first_name,直为执行 , last_name) AS full_name, count(*) FROMtable GROUPBY full_name 1.2.3.