MSSQL如何获取最新金额

Question

如何获取最新金额，我已经有一些查询，但是显示了两条记录，我希望仅显示“ 7370”当前金额

Answer 1

您可以使用相关子查询

select * from tablename a where lasttime in (select max(lasttime) from tablename b where a.id=b.id)

或者您可以使用row_number（）

select * from
(
select *,row_number() over(partition by id order by lasttime desc) as rn from tablename
)A where rn=1

Answer 2

只需在字段前面添加前1名。

Select TOP 1 fields from table

Answer 3

  SELECT TOP 1 currentBalance FROM DBO.tbl_billing ORDER BY [date]