如何使用join和子查询优化查询?

tmb3ates  于 2021-07-26  发布在  Java
关注(0)|答案(1)|浏览(274)

我希望能够列出st.balancechange的总和,但针对不同的s.type。运行查询大约需要7分钟。我肯定有更好的方法来优化它,但我不知道如何优化。我不能将其用作子查询,因为我需要返回多个结果。

SELECT DISTINCT a.ACCOUNTNUMBER AS [Account Number]
    , s1.Deposit AS [Aggregate Share Balance]
    , c.Deposit AS [Aggregate Checking Balance]

FROM dbo.ACCOUNT a

JOIN dbo.SAVINGS s
    ON a.ACCOUNTNUMBER = s.PARENTACCOUNT
        AND a.ProcessDate = s.ProcessDate

JOIN (SELECT a.ACCOUNTNUMBER
    , SUM(st.BALANCECHANGE) AS [Deposit]
FROM dbo.ACCOUNT a
JOIN dbo.SAVINGS s
    ON a.ACCOUNTNUMBER = s.PARENTACCOUNT
        AND a.ProcessDate = s.ProcessDate
JOIN dbo.SAVINGSTRANSACTION st
    ON st.PARENTACCOUNT = s.PARENTACCOUNT
WHERE a.ProcessDate = CONVERT(VARCHAR(8), DATEADD(DAY,-1, GETDATE()), 112)
    AND a.CLOSEDATE IS NULL
    AND s.CLOSEDATE IS NULL 
    AND st.ACTIONCODE = 'D'
    AND s.TYPE IN (0, 1, 2, 3, 4, 6, 100)
    GROUP BY a.ACCOUNTNUMBER) s1 ON s1.ACCOUNTNUMBER = a.ACCOUNTNUMBER

LEFT JOIN (SELECT a.ACCOUNTNUMBER
    , SUM(st.BALANCECHANGE) AS [Deposit]
FROM dbo.ACCOUNT a
JOIN dbo.SAVINGS s
    ON a.ACCOUNTNUMBER = s.PARENTACCOUNT
        AND a.ProcessDate = s.ProcessDate
JOIN dbo.SAVINGSTRANSACTION st
    ON st.PARENTACCOUNT = s.PARENTACCOUNT
WHERE a.ProcessDate = CONVERT(VARCHAR(8), DATEADD(DAY,-1, GETDATE()), 112)
    AND a.CLOSEDATE IS NULL
    AND s.CLOSEDATE IS NULL 
    AND st.ACTIONCODE = 'D'
    AND s.TYPE IN (2, 100, 101, 102, 103, 104, 105, 106, 107, 108, 113, 150, 201)
    GROUP BY a.ACCOUNTNUMBER) c ON c.ACCOUNTNUMBER = a.ACCOUNTNUMBER

WHERE a.ProcessDate = CONVERT(VARCHAR(8), dateadd(day,-1, getdate()), 112)
    AND a.CLOSEDATE IS NULL
    AND s.CLOSEDATE IS NULL 
ORDER BY a.ACCOUNTNUMBER

当前结果:

Account Number  Aggregate Share Balance   Aggregate Checking Balance
0000001234           7383.58                      NULL
0000001235           95856.83                   95856.83
0000001236            123.27                     123.27
0000001237             1.88                       NULL
0000001238           14812.26                     NULL
0000001239            15.00                       NULL
0000001240            4.06                        NULL
0000001241            6.42                        3.21
0000001242           3705.03                    3705.03
0000001243          976841.06                  1465261.59
x6yk4ghg

x6yk4ghg1#

我认为你不需要两次查询余额。两个子查询之间的唯一区别是类型。您可以尝试类似于下面的操作,并且只能查询一次。我还认为distinct是没有必要的,因为如果删除子查询,您可以按帐号对主查询进行分组。

SELECT a.ACCOUNTNUMBER AS [Account Number],
    SUM(CASE WHEN s.TYPE IN (0, 1, 2, 3, 4, 6, 100) THEN st.BALANCECHANGE ELSE NULL END) AS [Aggregate Share Balance],
    SUM(CASE WHEN s.TYPE IN (2, 100, 101, 102, 103, 104, 105, 106, 107, 108, 113, 150, 201) THEN st.BALANCECHANGE ELSE NULL END) AS [Aggregate Share Balance]
FROM dbo.ACCOUNT a
JOIN dbo.SAVINGS s ON a.ACCOUNTNUMBER = s.PARENTACCOUNT AND a.ProcessDate = s.ProcessDate
LEFT OUTER JOIN dbo.SAVINGSTRANSACTION st ON st.PARENTACCOUNT = s.PARENTACCOUNT
WHERE
    a.ProcessDate = CONVERT(VARCHAR(8), dateadd(day,-1, getdate()), 112)
    AND a.CLOSEDATE IS NULL
    AND s.CLOSEDATE IS NULL
GROUP BY
    a.ACCOUNTNUMBER
ORDER BY 
    a.ACCOUNTNUMBER

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