用于从具有多个条件的多个表中的多个列中获取数据的存储过程

Posted 2023-05-09

【中文标题】用于从具有多个条件的多个表中的多个列中获取数据的存储过程

【英文标题】：stored procedure to fetch data from multiple columns in multiple tables with multiple criteria's

【发布时间】：2017-10-18 00:50:07

【问题描述】：

我在寻找什么？

创建一个存储过程来将结果写入一个表，或者最坏的情况是简化这个查询。

查询

SELECT CONCAT(ba.BRANCH_NUMBER,ba.CLIENT_ID) AS BANK_ACCOUNT_NUMBER,
bp.ORIGINAL_REGISTERED_ID,
bap.ANOTHER_COLUMN_1,
bap.ANOTHER_COLUMN_2,
bap.ANOTHER_COLUMN_3,
bap.ANOTHER_COLUMN_4,
bd.ANOTHER_COLUMN_1,
bd.REGISTERED_ID
FROM BANK_ACCOUNT_PARTNER bap,
BANK_PARTNER bp,
BANK_ACCOUNT ba,
BANKING_DATA bd
WHERE bap.PARTNER_ID=bp.PARTNER_ID
AND bap.ACCOUNT_ID=ba.ACCOUNT_ID
AND ba.REGISTERED_ID=bd.REGISTERED_ID
AND bap.ACCOUNT_ID IN
    (SELECT ACCOUNT_ID FROM(SELECT ba.ACCOUNT_ID,
    ROW_NUMBER() OVER (PARTITION BY ba.BRANCH_NUMBER, ba.CLIENT_ID ORDER BY bd.ACCOUNT_OPENED_DATE DESC) ROW_NUMBER
    FROM BANK_ACCOUNT ba,
    BANKING_DATA bd,
    ANOTHER_TABLE at
    WHERE da.REGISTERED_ID = bd.REGISTERED_ID
    AND at.REGISTERED_ID=bd.REGISTERED_ID
    AND ANOTHER_CRITERIA_COLUMN = 'someValue'
    AND ANOTHER_CRITERIA_COLUMN IN ('someValue1','someValue2','someValue3')
    AND ba.ANOTHER_CRITERIA_COLUMN='someValue'
    AND ba.ACCOUNT_MATURITY_DATE IS NULL) WHERE ROW_NUMBER='1');

提前致谢。

【问题讨论】：

问题是什么？

@BaSsGaz - 我如何通过创建存储过程来简化这一点

它应该怎么做？只执行这个查询？

如问题所述，我需要将这个查询的结果写入一个表中

【参考方案1】：

对于标量查询，您可以使用CURSOR 或简单的SELECT INTO 从查询中检索结果，如下所示：

CREATE PROCEDURE myProcedure IS
        BANK_ACCOUNT_NUMBER VARCHAR(30);
        ORIGINAL_REGISTERED_ID BANK_PARTNER.ORIGINAL_REGISTERED_ID%TYPE;
        ANOTHER_COLUMN_BAP1 BANK_ACCOUNT_PARTNER.ANOTHER_COLUMN_1%TYPE;
        ANOTHER_COLUMN_2 BANK_ACCOUNT_PARTNER.ANOTHER_COLUMN_2%TYPE;
        ANOTHER_COLUMN_3 BANK_ACCOUNT_PARTNER.ANOTHER_COLUMN_3%TYPE;
        ANOTHER_COLUMN_4 BANK_ACCOUNT_PARTNER.ANOTHER_COLUMN_4%TYPE;
        ANOTHER_COLUMN_BD1 BANKING_DATA.ANOTHER_COLUMN_1%TYPE;
        REGISTERED_ID BANKING_DATA.REGISTERED_ID%TYPE;
BEGIN
    SELECT CONCAT(ba.BRANCH_NUMBER,ba.CLIENT_ID) AS BANK_ACCOUNT_NUMBER,
    bp.ORIGINAL_REGISTERED_ID,
    bap.ANOTHER_COLUMN_1,
    bap.ANOTHER_COLUMN_2,
    bap.ANOTHER_COLUMN_3,
    bap.ANOTHER_COLUMN_4,
    bd.ANOTHER_COLUMN_1,
    bd.REGISTERED_ID INTO BANK_ACCOUNT_NUMBER, ORIGINAL_REGISTERED_ID, ANOTHER_COLUMN_BAP1, ANOTHER_COLUMN_2, ANOTHER_COLUMN_3, ANOTHER_COLUMN_4,  ANOTHER_COLUMN_BD1, REGISTERED_ID
    FROM BANK_ACCOUNT_PARTNER bap,
    BANK_PARTNER bp,
    BANK_ACCOUNT ba,
    BANKING_DATA bd
    WHERE bap.PARTNER_ID=bp.PARTNER_ID
    AND bap.ACCOUNT_ID=ba.ACCOUNT_ID
    AND ba.REGISTERED_ID=bd.REGISTERED_ID
    AND bap.ACCOUNT_ID IN
        (SELECT ACCOUNT_ID FROM(SELECT ba.ACCOUNT_ID,
        ROW_NUMBER() OVER (PARTITION BY ba.BRANCH_NUMBER, ba.CLIENT_ID ORDER BY bd.ACCOUNT_OPENED_DATE DESC) ROW_NUMBER
        FROM BANK_ACCOUNT ba,
        BANKING_DATA bd,
        ANOTHER_TABLE at
        WHERE da.REGISTERED_ID = bd.REGISTERED_ID
        AND at.REGISTERED_ID=bd.REGISTERED_ID
        AND ANOTHER_CRITERIA_COLUMN = 'someValue'
        AND ANOTHER_CRITERIA_COLUMN IN ('someValue1','someValue2','someValue3')
        AND ba.ANOTHER_CRITERIA_COLUMN='someValue'
        AND ba.ACCOUNT_MATURITY_DATE IS NULL) WHERE ROW_NUMBER='1');

    INSERT INTO myTable VALUES(BANK_ACCOUNT_NUMBER, ORIGINAL_REGISTERED_ID, ANOTHER_COLUMN_BAP1, ANOTHER_COLUMN_2, ANOTHER_COLUMN_3, ANOTHER_COLUMN_4,  ANOTHER_COLUMN_BD1, REGISTERED_ID);
END;
/

或者使用CURSOR 循环：

CREATE PROCEDURE myProcedure IS
    CURSOR query IS 
        SELECT CONCAT(ba.BRANCH_NUMBER,ba.CLIENT_ID) AS BANK_ACCOUNT_NUMBER,
        bp.ORIGINAL_REGISTERED_ID,
        bap.ANOTHER_COLUMN_1 AS ANOTHER_COLUMN_BAP1,
        bap.ANOTHER_COLUMN_2,
        bap.ANOTHER_COLUMN_3,
        bap.ANOTHER_COLUMN_4,
        bd.ANOTHER_COLUMN_1 AS ANOTHER_COLUMN_BD1,
        bd.REGISTERED_ID
        FROM BANK_ACCOUNT_PARTNER bap,
        BANK_PARTNER bp,
        BANK_ACCOUNT ba,
        BANKING_DATA bd
        WHERE bap.PARTNER_ID=bp.PARTNER_ID
        AND bap.ACCOUNT_ID=ba.ACCOUNT_ID
        AND ba.REGISTERED_ID=bd.REGISTERED_ID
        AND bap.ACCOUNT_ID IN
            (SELECT ACCOUNT_ID FROM(SELECT ba.ACCOUNT_ID,
            ROW_NUMBER() OVER (PARTITION BY ba.BRANCH_NUMBER, ba.CLIENT_ID ORDER BY bd.ACCOUNT_OPENED_DATE DESC) ROW_NUMBER
            FROM BANK_ACCOUNT ba,
            BANKING_DATA bd,
            ANOTHER_TABLE at
            WHERE da.REGISTERED_ID = bd.REGISTERED_ID
            AND at.REGISTERED_ID=bd.REGISTERED_ID
            AND ANOTHER_CRITERIA_COLUMN = 'someValue'
            AND ANOTHER_CRITERIA_COLUMN IN ('someValue1','someValue2','someValue3')
            AND ba.ANOTHER_CRITERIA_COLUMN='someValue'
            AND ba.ACCOUNT_MATURITY_DATE IS NULL) WHERE ROW_NUMBER='1');
BEGIN
     FOR line IN query LOOP
        INSERT INTO myTable VALUES(line.BANK_ACCOUNT_NUMBER, line.ORIGINAL_REGISTERED_ID, line.ANOTHER_COLUMN_BAP1, line.ANOTHER_COLUMN_2, line.ANOTHER_COLUMN_3, line.ANOTHER_COLUMN_4,  line.ANOTHER_COLUMN_BD1, line.REGISTERED_ID);
     END LOOP;
END;
/

【讨论】：

感谢@BaSsGaz，关于性能 CURSOR 与 SELECT INTO 的任何建议？

@Cmen535 我不知道有任何明显的性能差异！我个人使用SELECT INTO 进行这样的快速查询关联，当我需要循环结果以获得更多控制权时使用CURSOR。