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POUPDATE...FROM in MySQL
 

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    <p>I have come to know that MySQL doesn't support <code>UPDATE...FROM</code>. What's the alternative to that?</p> <p>Actually I am trying to convert a MS-SQL Server Stored procedure to MySQL Stored procedure, and I am stuck at this line where it does:</p> <pre><code>UPDATE LedgerTbl SET RunninTotal = RTotal = RunningTotal + (DEBIT-CREDIT) FROM LedgerTbl; </code></pre> <p><strong>Here is the complete SQL Server Stored procedure:</strong></p> <pre><code>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 </code></pre> <p><strong>And here is the MySQL Stored procedure that I have transformed it to:</strong></p> <pre><code>DELIMETER// CREATE PROCEDURE `Acc_Ledger` () BEGIN DECLARE RunningTotal DECIMAL(19,2); 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; </code></pre>
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    1. USEduardo Dennis
    1. USKamran Ahmed
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    1. COLook over [the Mysql `UPDATE` syntax reference](http://dev.mysql.com/doc/refman/5.0/en/update.html) MySQL doesn't have a `FROM` clause in `UPDATE`. The table spec comes after the `UPDATE` keyword, may include joins, etc.
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      1. USMichael Berkowski
 

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