sql-server-2008 - Sql server 查询以获取表更改结果

Question

我有一张如下表

ClientID        AccountNumber   BalanceOnDay0       BalanceOnDay1   BalanceOnDay2       BalanceOnDay3       BalanceOnDay4       BalanceOnDay5       BalanceOnDay6       BalanceOnDay7
ABC1            123             10                  NULL            NULL                NULL                NULL                NULL                NULL                NULL    
ABC1            123             NULL                NULL            NULL                NULL                NULL                NULL                NULL                3       

我希望看到如下结果。

ClientID        AccountNumber   BalanceOnDay0       BalanceOnDay1   BalanceOnDay2       BalanceOnDay3       BalanceOnDay4       BalanceOnDay5       BalanceOnDay6       BalanceOnDay7
ABC1            123             10                  NULL            NULL                NULL                NULL                NULL                NULL                3

请建议！

Answer 1

SUM()如果您想组合余额值，如果您有多个记录，则可以使用：

select clientid,
  accountnumber,
  sum(BalanceOnDay0) BalanceOnDay0, 
  sum(BalanceOnDay1) BalanceOnDay1, 
  sum(BalanceOnDay2) BalanceOnDay2,
  sum(BalanceOnDay3) BalanceOnDay3,
  sum(BalanceOnDay4) BalanceOnDay4, 
  sum(BalanceOnDay5) BalanceOnDay5,
  sum(BalanceOnDay6) BalanceOnDay6, 
  sum(BalanceOnDay7) BalanceOnDay7
from table1
group by clientid, accountnumber

请参阅带有演示的 SQL Fiddle