Question

我正在使用Pervasive SQL。我有以下多个SQL语句的UNION。有没有办法清理它，特别是付款日期和每个语句中选择的Loc No字段。有没有办法解决这个问题，只有一个地方需要改变这两个领域？

(
    SELECT 
    '23400' as Gl_Number,
        y.Plan as Description,
        0 as Hours,
        ROUND(SUM(Ee_Curr),2) as Debit,
        0 as Credit
    FROM "PR_YLOC" y
    LEFT JOIN PR_SUMM s ON (s.Summ_No = y.Summ_No)
    WHERE y.Loc_No = 1041
    AND s.Pay_Date = '2010-04-02'
    AND y.Code IN (100, 105, 110)
    AND y.Type = 3
    GROUP BY y.Plan
) UNION (
    SELECT 
    '72000' as Gl_Number,
        y.Plan,
        0,
        ROUND(SUM(Er_Curr),2),
        0
    FROM "PR_YLOC" y
    LEFT JOIN PR_SUMM s ON (s.Summ_No = y.Summ_No)
    WHERE y.Loc_No = 1041
    AND s.Pay_Date = '2010-04-02'
    AND y.Code IN (100, 105, 110)
    AND y.Type = 3
    GROUP BY y.Plan
) UNION (
SELECT '24800',
       c.Plan,
       0,
       ROUND(SUM(Ee_Amt),2),
       0
    FROM "PR_CDED" c WHERE Pay_Date = '2010-04-02' AND Loc_No = 1041 AND Code = 100
    GROUP BY c.Plan
) UNION (
SELECT '24800',
       c.Plan,
       0,
       0,
       ROUND(SUM(Ee_Amt),2)
    FROM "PR_CDED" c WHERE Pay_Date = '2010-04-02' AND Loc_No = 1041 AND Code = 115
    GROUP BY c.Plan
) UNION (
SELECT '24150',
       c.Plan,
       0,
       0,
       ROUND(SUM(Ee_Amt),2)    
    FROM "PR_CDED" c WHERE Pay_Date = '2010-04-02' AND Loc_No = 1041 AND Code = 241
    GROUP BY c.Plan
) UNION (
SELECT '24150',
       c.Plan,
       0,
       ROUND(SUM(Ee_Amt),2),
       0
    FROM "PR_CDED" c WHERE Pay_Date = '2010-04-02' AND Loc_No = 1041 AND Code = 239
    GROUP BY c.Plan
) UNION (
SELECT '24120',
       c.Plan,
       0,
       ROUND(SUM(Ee_Amt),2),
       0
    FROM "PR_CDED" c WHERE Pay_Date = '2010-04-02' AND Loc_No = 1041 AND Code = 230
    GROUP BY c.Plan
) UNION (
SELECT '24100',
       c.Plan,
       0,
       ROUND(SUM(Ee_Amt),2),
       0
    FROM "PR_CDED" c WHERE Pay_Date = '2010-04-02' AND Loc_No = 1041 AND Code = 225
    GROUP BY c.Plan
) UNION (
SELECT '23800',
       c.Plan,
       0,
       ROUND(SUM(Ee_Amt),2),
       0
    FROM "PR_CDED" c WHERE Pay_Date = '2010-04-02' AND Loc_No = 1041 AND Code = 245
    GROUP BY c.Plan
) UNION (
select m.Def_Dept as Gl_Number, t.Short_Desc,
    (SELECT SUM(Hours) FROM pr_earn en WHERE en.Loc_No = e.Loc_No AND en.Emp_No = e.Emp_No AND en.Pay_Date = e.Pay_Date AND en.Pay_Code = e.Pay_Code) as Hours,
    (SELECT SUM(Pay_Amt) FROM pr_earn en WHERE en.Loc_No = e.Loc_No AND en.Emp_No = e.Emp_No AND en.Pay_Date = e.Pay_Date AND en.Pay_Code = e.Pay_Code) as Debit,
    0
from pr_earn e
left join pr_mast m on (e.Loc_No = m.Loc_No and e.Emp_No = m.Emp_No)
left join pr_ptype t ON (t.Code = e.Pay_Code)
where e.loc_no = 1041 and e.pay_date = '2010-04-02'
group by m.Def_Dept, t.Short_Desc
)

由于

Answer 1

你能用这样的东西替换中间的SELECT语句吗？

) UNION (
SELECT CASE Code
         WHEN 100 THEN '24800'
         WHEN 115 THEN '24800',
         WHEN 241 THEN '24150'
         WHEN 239 THEN '24150',
         WHEN 230 THEN '24120',
         WHEN 225 THEN '24100'
         WHEN 245 THEN '23800',
       END,
       c.Plan,
       0,
       ROUND(SUM(Ee_Amt),2),
       0
    FROM "PR_CDED" c WHERE Pay_Date = '2010-04-02' AND Loc_No = 1041 AND Code IN (100, 115, 241, 239, 230, 225, 245)
    GROUP BY c.Plan
) UNION (

这是一个T-SQL CASE语句，但我确信Oracle PL / SQL有类似的东西。

Answer 2

您可以使用过滤条件AND Code = ...替换只有一个选项，而不是使用几乎相同的过滤条件（差异为“AND Code IN (..., ..., ...)”）的多个选项。

Answer 3

好像你试图在不影响性能的情况下提高可维护性。我不知道这个平台，但我猜你可以将一个where子句移动到最后，将你的Unions作为子查询，并且查询优化器可能能够找出在每个联合集中应用where条件

Answer 4

您可以使用案例陈述。 E.g：

SELECT  
'23400' as Gl_Number, 
    y.Plan as Description, 
    0 as Hours, 
    ROUND(SUM(Ee_Curr),2) as Debit, 
    0 as Credit 
FROM "PR_YLOC" y 
LEFT JOIN PR_SUMM s ON (s.Summ_No = y.Summ_No) 
WHERE y.Loc_No = 1041 
AND s.Pay_Date = '2010-04-02' 
AND y.Code IN (100, 105, 110) 
AND y.Type = 3 
GROUP BY y.Plan 
UNION
SELECT  
'72000' as Gl_Number, 
    y.Plan, 
    0, 
    ROUND(SUM(Er_Curr),2), 
    0 
FROM "PR_YLOC" y 
LEFT JOIN PR_SUMM s ON (s.Summ_No = y.Summ_No) 
WHERE y.Loc_No = 1041 
AND s.Pay_Date = '2010-04-02' 
AND y.Code IN (100, 105, 110) 
AND y.Type = 3 
GROUP BY y.Plan 
UNION
SELECT case Code 
            when Code in (100,115) then'24800'
            when Code in (241, 239) then'24150'
            when Code = 230 then'24120'
            when Code = 225 then'24100'
            when Code = 245 then'23800'
        end, 
       c.Plan, 
       0, 
       ROUND(SUM(Ee_Amt),2), 
       0 
    FROM "PR_CDED" c WHERE Pay_Date = '2010-04-02' AND Loc_No = 1041 AND Code in (100,115,241,239,230,225,245)
    GROUP BY c.Plan 
select m.Def_Dept as Gl_Number, t.Short_Desc, 
    (SELECT SUM(Hours) FROM pr_earn en WHERE en.Loc_No = e.Loc_No AND en.Emp_No = e.Emp_No AND en.Pay_Date = e.Pay_Date AND en.Pay_Code = e.Pay_Code) as Hours, 
    (SELECT SUM(Pay_Amt) FROM pr_earn en WHERE en.Loc_No = e.Loc_No AND en.Emp_No = e.Emp_No AND en.Pay_Date = e.Pay_Date AND en.Pay_Code = e.Pay_Code) as Debit, 
    0 
from pr_earn e 
left join pr_mast m on (e.Loc_No = m.Loc_No and e.Emp_No = m.Emp_No) 
left join pr_ptype t ON (t.Code = e.Pay_Code) 
where e.loc_no = 1041 and e.pay_date = '2010-04-02' 
group by m.Def_Dept, t.Short_Desc

改进SQL代码

4 个答案: