将 MS-SQL Server 存储过程转换为 MySQL Query

Question

我在过去的一个小时里被困在这个问题上，无法将此 MSSQL Server 存储过程转换为“MySQL 查询”：

DECLARE @LedgerTbl TABLE (PARTY_ID VARCHAR(100),VRDATE VARCHAR(200),
                          VRNOA VARCHAR(200),ETYPE VARCHAR(50),
                          DESCRIPTION VARCHAR(500),DEBIT DECIMAL,
                          CREDIT DECIMAL, RunningTotal decimal) 

DECLARE @RunningTotal decimal 

SET @RunningTotal = 0 

INSERT INTO @LedgerTbl 
SELECT PARTY_ID,VRDATE,DCNO VRNOA,ETYPE,DESCRIPTION,DEBIT,CREDIT, null 
FROM PLEDGER WHERE PARTY_ID=@partyId AND VRDATE BETWEEN @from AND @to 
ORDER BY VRDATE,ETYPE,VRNOA 

UPDATE @LedgerTbl 
SET @RunningTotal = RunningTotal = @RunningTotal + (DEBIT-CREDIT) 
FROM @LedgerTbl 

SELECT * FROM @LedgerTbl 

如何将其转换为单个 MySQL 查询或 MySQL 存储过程？

更新

我试图将其转换为，但它给了我以下错误：

DELIMETER //

CREATE PROCEDURE `Acc_Ledger` ()
BEGIN
    DECLARE RunningTotal DECIMAL;
    SET RunningTotal = 0;
    CREATE TEMPORARY TABLE LedgerTbl (PARTY_ID VARCHAR(100),VRDATE VARCHAR(200),VRNOA VARCHAR(200),ETYPE VARCHAR(50),DESCRIPTION VARCHAR(500),DEBIT DECIMAL,RTotal decimal);
    INSERT INTO LedgerTbl 
    SELECT PARTY_ID,VRDATE,DCNO VRNOA,ETYPE,DESCRIPTION,DEBIT,CREDIT, null 
    FROM PLEDGER WHERE PARTY_ID=17 AND VRDATE BETWEEN '2013/12/02' AND '2010/12/02' 
    ORDER BY VRDATE,ETYPE,VRNOA; 

    UPDATE LedgerTbl 
    SET RunninTotal = RTotal = RunningTotal + (DEBIT-CREDIT) 
    FROM LedgerTbl; 

    SELECT * FROM LedgerTbl;
END//
DELIMETER;

以下是错误：

您的 SQL 查询中似乎有错误。下面的 MySQL 服务器错误输出，如果有的话，也可以帮助您诊断问题

错误：未知标点字符串@ 10 STR：// SQL：DELIMETER//

创建过程Acc_Ledger () BEGIN DECLARE RunningTotal DECIMAL;DELIMETER//

创建过程Acc_Ledger () BEGIN DECLARE RunningTotal DECIMAL;DELIMETER//

创建过程Acc_Ledger () BEGIN DECLARE RunningTotal DECIMAL;DELIMETER//

创建过程Acc_Ledger () BEGIN DECLARE RunningTotal DECIMAL;DELIMETER//

创建过程Acc_Ledger () BEGIN DECLARE RunningTotal DECIMAL;DELIMETER//

创建过程Acc_Ledger () BEGIN DECLARE RunningTotal DECIMAL;DELIMETER//

创建过程Acc_Ledger () BEGIN DECLARE RunningTotal DECIMAL;DELIMETER//

创建过程Acc_Ledger () BEGIN DECLARE RunningTotal DECIMAL;

SQL 查询：

DELIMETER// 创建过程Acc_Ledger () BEGIN DECLARE RunningTotal DECIMAL;

MySQL 说：文档

#1064 - 您的 SQL 语法有错误；检查与您的 MySQL 服务器版本相对应的手册以获取正确的语法使用 'DELIMETER//

附近

创建过程Acc_Ledger () BEGIN 在第 1 行声明 RunningTotal'

有人可以评价一下吗？

Answer 1

我必须自己编写这个过程，这里是帮助我理解 MySQL 中的存储过程的链接：http://net.tutsplus.com/tutorials/an-introduction-to-stored-procedures/。以及我想出的程序

DROP PROCEDURE IF EXISTS `Acc_Ledger`;

DELIMITER //

CREATE PROCEDURE `Acc_Ledger` ()
BEGIN
    DECLARE RunningTotal, deb, cred DECIMAL(19,2);
    DECLARE counter, row_count int;

    SET RunningTotal = 0;
    SET counter = 1;

    DROP TABLE IF EXISTS LedgerTbl;

    CREATE TEMPORARY TABLE LedgerTbl (CTR int primary key auto_increment, PARTY_ID INT,VRDATE VARCHAR(200),VRNOA VARCHAR(200),ETYPE VARCHAR(50),DESCRIPTION VARCHAR(500),DEBIT DECIMAL(19,2),CREDIT DECIMAL(19,2),RTotal DECIMAL(19,2));

    INSERT INTO LedgerTbl
    SELECT 0, PARTY_ID,VRDATE,DCNO,ETYPE,DESCRIPTION,DEBIT,CREDIT, null FROM PLEDGER WHERE PARTY_ID=17 AND VRDATE BETWEEN '2010/10/02' AND '2013/12/02' 
    ORDER BY VRDATE,ETYPE,DCNO;

    SELECT COUNT(*) INTO row_count FROM LedgerTbl;

    WHILE counter <= row_count DO

        SELECT debit INTO deb FROM LedgerTbl WHERE ctr = counter;
        SELECT credit INTO cred FROM LedgerTbl WHERE ctr = counter;
        SET RunningTotal = RunningTotal + (deb-cred);

        UPDATE LedgerTbl 
        SET LedgerTbl.RTotal = RunningTotal
        WHERE ctr = counter;  

        SET counter = counter + 1;

    END WHILE;

    SELECT * FROM LedgerTbl;
END//
DELIMITER ;

更新

现在我找到了比较有效的解决方案：

DROP PROCEDURE IF EXISTS `Acc_Ledger`;

DELIMITER //

CREATE PROCEDURE `Acc_Ledger` ()
BEGIN
    DECLARE RunningTotal, deb, cred DECIMAL(19,2);
    DECLARE counter, row_count int;

    SET RunningTotal = 0;
    SET counter = 1;

    DROP TABLE IF EXISTS LedgerTbl;

    CREATE TEMPORARY TABLE LedgerTbl (CTR int primary key auto_increment, PARTY_ID INT,VRDATE VARCHAR(200),VRNOA VARCHAR(200),ETYPE VARCHAR(50),DESCRIPTION VARCHAR(500),DEBIT DECIMAL(19,2),CREDIT DECIMAL(19,2),RTotal DECIMAL(19,2));

    INSERT INTO LedgerTbl
    SELECT 0, PARTY_ID,VRDATE,DCNO,ETYPE,DESCRIPTION,DEBIT,CREDIT, null FROM PLEDGER WHERE PARTY_ID=17 AND VRDATE BETWEEN '2010/10/02' AND '2013/12/02' 
    ORDER BY VRDATE,ETYPE,DCNO;

    SELECT COUNT(*) INTO row_count FROM LedgerTbl;

    SET @RunningTotal := 0;

    UPDATE LedgerTbl 
    SET RTotal = (@RunningTotal := @RunningTotal + (DEBIT - CREDIT));

    SELECT * FROM LedgerTbl;
END//
DELIMITER ;

Answer 2

MSSQL 过程似乎计算了一个运行总计，
我已经在 sqlfiddle 上测试了这个过程（稍作修改），它给出了以下结果：
http://www.sqlfiddle.com/#!6/0e909/1

MSSQL 过程在这里可能包含一个错字：SELECT PARTY_ID,VRDATE,DCNO VRNOA,ETYPE, 尚不清楚 DCNO VRNOA 是两个单独的列，还是一列 DCNO_VRNOA 之间带有“缺失”下划线。
我假设它们是两个独立的列。

要在 MySql 中计算运行总计，无需使用临时表。
这个简单的查询完成了这项任务：

SELECT PARTY_ID,VRDATE,DCNO, VRNOA,ETYPE,DESCRIPTION,
       DEBIT,
       CREDIT, 
       @RunningTotal := @RunningTotal + (DEBIT-CREDIT) RunningTotal 
FROM PLEDGER ,
     ( SELECT @RunningTotal:=0) init_variables
WHERE PARTY_ID=1 
  AND VRDATE BETWEEN '2013-11-11' AND '2013-11-11'
ORDER BY VRDATE,ETYPE,VRNOA; 

在此处查看演示：--> http://www.sqlfiddle.com/#!2/daa6e/1

该过程可能如下所示：

DELIMITER /
CREATE PROCEDURE `Acc_Ledger` ()
BEGIN
    SELECT PARTY_ID,VRDATE,DCNO, VRNOA,ETYPE,DESCRIPTION,
           DEBIT,
           CREDIT, 
           @RunningTotal := @RunningTotal + (DEBIT-CREDIT) RunningTotal 
    FROM PLEDGER ,
         ( SELECT @RunningTotal:=0) init_variables
    WHERE PARTY_ID=1 
      AND VRDATE BETWEEN '2013-11-11' AND '2013-11-11'
    ORDER BY VRDATE,ETYPE,VRNOA; 
END /
DELIMITER ;