Question

我有两个oracle select statememts，从同一个表中选择数据。

SELECT   empid, empname, days, SUM (amount) Amount1
FROM tbl_details
WHERE particulars IN ('Basic Pay', 'Allowances')
GROUP BY empid, empname, days

SELECT   empid, empname, days, SUM (amount) Amount2
FROM tbl_details
WHERE particulars IN ('Water Charge', 'Housing Allowance') 
GROUP BY empid, empname,tdays

我想将它绑定到一个select语句，以便我得到一个resulatant，列有empid，empname，days，Amount1，Amount2

有人可以帮我这样做吗？提前谢谢。

Answer 1

使用UNION：

SELECT   empid, empname, days, SUM (amount) Amount
FROM tbl_details
WHERE particulars IN ('Basic Pay', 'Allowances')
GROUP BY empid, empname, days
UNION
SELECT   empid, empname, days, SUM (amount) Amount
FROM tbl_details
WHERE particulars IN ('Water Charge', 'Housing Allowance') 
GROUP BY empid, empname,tdays

默认情况下，如果您希望将重复记录替换为UNION

，联合将消除重复记录

Answer 2

尝试联盟

SELECT   empid, empname, days, SUM (amount) Amount1
FROM tbl_details
WHERE particulars IN ('Basic Pay', 'Allowances')
GROUP BY empid, empname, days

UNION

SELECT   empid, empname, days, SUM (amount) Amount2
FROM tbl_details
WHERE particulars IN ('Water Charge', 'Housing Allowance') 
GROUP BY empid, empname,tdays

Answer 3

我认为下面会帮助你

SELECT empid,
   empname,
   days,
   Sum (CASE
          WHEN particulars IN ( 'Water Charge', 'Housing Allowance' ) THEN
          amount
          ELSE 0
        END) Amount2,
   Sum (CASE
          WHEN particulars IN ( 'Basic Pay', 'Allowances' ) THEN 
          amount
          ELSE 0
        END) Amount1
FROM   tbl_details
GROUP  BY empid,
      empname,
      days

绑定两个select语句

3 个答案: