SQL行列转换算法1
请用一个sql语句得出结果 从table1,table2中取出如table3所列格式数据，注意提供的数据及结果不准确，只是作为一个格式向大家请教。 如使用存储过程也可以。 table1 月份mon 部门dep 业绩yj ------------------------------- 一月份 01 10 一月份 02 10 一月
请用一个sql语句得出结果从table1,table2中取出如table3所列格式数据，注意提供的数据及结果不准确，只是作为一个格式向大家请教。
如使用存储过程也可以。
table1
月份mon 部门dep 业绩yj
-------------------------------
一月份 01 10
一月份 02 10
一月份 03 5
二月份 02 8
二月份 04 9
三月份 03 8
table2
部门dep 部门名称dname
--------------------------------
01 国内业务一部
02 国内业务二部
03 国内业务三部
04 国际业务部
table3 （result）
部门dep 一月份 二月份 三月份
--------------------------------------
01 10 null null
02 10 8 null
03 5 null 8
04 null 9 null
------------------------------------------
select dname,b.yj '一月份',c.yj '二月份',d.yj '三月份' from table2 a left join table1 b on a.dep=b.dep and b.mon='一月份' left join table1 c on a.dep = c.dep and c.mon='二月份' left join table1 d on a.dep = d.dep and d.mon='三月份'
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