摘要:
1.并集SELECT Name FROM Person_1 UNION SELECT Name FROM Person_22.交集SELECT Name FROM Person_1 INTERSECT SELECT Name FROM Person_23.差集SELECT Name FROM... 阅读全文
摘要:
select top 20 * from ( select PromotionRateAmount,(cast(year(ReserveDate) as varchar(4))+cast(month(ReserveDate) as varchar(2))) as MonthSum,Orde... 阅读全文