Sql server 2008 Sql server查询以获取表更改结果

我有一张如下的桌子

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       

我想看看结果如何

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

请建议

如果要组合余额值，如果有多条记录，可以使用SUM：

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

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请参见设计非常糟糕的表格：。