Sql server 如何在SQL中从多个设计相同的表中获取数据

我对SQL比较陌生。我有表

emp010115

，

emp020115

，

emp030115

。。。。截至2015年1月每个日期的emp310115[表格名称表示其所属日期]。所有桌子的设计都是一样的。让前三个表中的数据如下所示

emp          tds            tdate
-------------------------------------
abc____________50_________2015-01-01 00:00:00
abc___________520_________2015-01-02 00:00:00
abc___________640_________2015-01-03 00:00:00
bca_____________0_________2015-01-01 00:00:00
bca____________20_________2015-01-02 00:00:00
bca___________920_________2015-01-03 00:00:00

emp01012015

：

emp       tds       investmnt       tdate                 arrears
------------------------------------------------------------------  
 abc_______50_________15000_________2015-01-01 00:00:00_______325
 bca________0_________10000_________2015-01-01 00:00:00_______420

emp       tds       investmnt       tdate                 arrears
------------------------------------------------------------------  
abc______520_________16000_________2015-01-02 00:00:00_______600
bca_______20_________14000_________2015-01-02 00:00:00_______740

emp       tds       investmnt       tdate                 arrears
------------------------------------------------------------------  
abc______640_________11000_________2015-01-03 00:00:00_______850
bca______920_________13000_________2015-01-03 00:00:00_______650

EMP2012015

：

emp       tds       investmnt       tdate                 arrears
------------------------------------------------------------------  
 abc_______50_________15000_________2015-01-01 00:00:00_______325
 bca________0_________10000_________2015-01-01 00:00:00_______420

emp       tds       investmnt       tdate                 arrears
------------------------------------------------------------------  
abc______520_________16000_________2015-01-02 00:00:00_______600
bca_______20_________14000_________2015-01-02 00:00:00_______740

emp       tds       investmnt       tdate                 arrears
------------------------------------------------------------------  
abc______640_________11000_________2015-01-03 00:00:00_______850
bca______920_________13000_________2015-01-03 00:00:00_______650

emp03012015

：

emp       tds       investmnt       tdate                 arrears
------------------------------------------------------------------  
 abc_______50_________15000_________2015-01-01 00:00:00_______325
 bca________0_________10000_________2015-01-01 00:00:00_______420

emp       tds       investmnt       tdate                 arrears
------------------------------------------------------------------  
abc______520_________16000_________2015-01-02 00:00:00_______600
bca_______20_________14000_________2015-01-02 00:00:00_______740

emp       tds       investmnt       tdate                 arrears
------------------------------------------------------------------  
abc______640_________11000_________2015-01-03 00:00:00_______850
bca______920_________13000_________2015-01-03 00:00:00_______650

我希望查询的结果如下表所示

emp          tds            tdate
-------------------------------------
abc____________50_________2015-01-01 00:00:00
abc___________520_________2015-01-02 00:00:00
abc___________640_________2015-01-03 00:00:00
bca_____________0_________2015-01-01 00:00:00
bca____________20_________2015-01-02 00:00:00
bca___________920_________2015-01-03 00:00:00

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有谁能帮我一下吗？

您可能不应该像这样拆分表，而是应该将所有数据保留在同一个表中（除非有很好的理由），但也就是说，您可以这样使用

union all

查询：

select emp, tds, tdate from emp01012015
union all
select emp, tds, tdate from emp02012015
union all 
select emp, tds, tdate from emp03012015
order by emp, tdate

这将创建一组单一的所有数据，然后您可以使用这些数据做您想要做的事情。不过，订购的方式与您的示例并不完全相同

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停止每天创建单独的表格即可。通常没有理由这么做。