Update statement in ms access jdbc not updating the row
Update statement in ms access jdbc not updating the row - dating directory personals
Here's how i keep my totals uptodate when the prepays change...INSERT INTO v8totals (tid,tyy,tmm,finances)SELECT '3218', YEAR(ppdate), MONTH(ppdate), SUM(ppamount) FROM bbprepay WHERE fkuserid='3218' GROUP BY YEAR(ppdate), MONTH(ppdate)ON DUPLICATE KEY UPDATE finances=(SELECT SUM(ppamount) FROM bbprepay WHERE fkuserid='3218' AND tyy=YEAR(ppdate) AND tmm=MONTH(ppdate) GROUP BY YEAR(ppdate), MONTH(ppdate))It might not be the best way to do an "Insert otherwise Update" but its working for me. :) If you need to update/insert a field and atomically get the previous value, here's a way to do the trick: SET @previous_note := NULL; INSERT INTO rencontre_note_moi_last_votes (id, note) VALUES (1, 2) ON DUPLICATE KEY UPDATE note = IF((@previous_note := note) NULL IS NULL is always [email protected]_note is set according to the value of a field, and that value is obviously the previous value, not the one being currently computed.
statement can be accomplished in one of two ways, primarily depending upon which version of SQL Server you are using.Doing SELECT and then INSERT is not a complete replacement of INSERT ON DUPLICATE KEY UPDATE: there is a race condition involved.You will still need to check whether your INSERT works, and if it doesn't then you need to do an update.If the software must support multiple database backends or versions, perhaps the generic, standard queries are the best bet.If performance is the goal and the queries don’t need to be portable, I see no reason not to use the solution that performs best.PDF (US Ltr) - 38.4Mb PDF (A4) - 38.4Mb PDF (RPM) - 37.8Mb HTML Download (TGZ) - 10.3Mb HTML Download (Zip) - 10.3Mb HTML Download (RPM) - 9.0Mb Man Pages (TGZ) - 197.5Kb Man Pages (Zip) - 306.2Kb Info (Gzip) - 3.5Mb Info (Zip) - 3.5Mb My SQL Backup and Recovery My SQL Globalization My SQL Information Schema My SQL Installation Guide My SQL and Linux/Unix My SQL and OS X My SQL Partitioning My SQL Performance Schema My SQL Replication Using the My SQL Yum Repository My SQL Restrictions and Limitations Security in My SQL My SQL and Solaris Building My SQL from Source Starting and Stopping My SQL My SQL Tutorial My SQL and Windows My SQL NDB Cluster 7.5 My SQL 5.7 Secure Deployment Guide statements are flagged as unsafe for statement-based replication.
Such statements produce a warning in the error log when using statement-based mode and are written to the binary log using the row-based format when using statement against a table having more than one unique or primary key is also marked as unsafe.That way, a new "note" is inserted of the "note" is changed, and the previous value is returned. The 'work around' suggested in the documentation to obtain the ID of a row updated using the DUPLICATE KEY UPDATE clause of an INSERT statement has a problem in addition to those mentioned by earlier posts.Namely, if you are using INNODB storage engine and have a FOREIGN KEY referencing the primary key of the table being updated, this strategy may fail with: ERROR 1451 (23000): Cannot delete or update a parent row: a foreign key constraint fails ....When using ON DUPLICATE KEY in combination with a BEFORE INSERT trigger note that if you update a NEW.col_name value in the BEFORE INSERT trigger this will effect the value och values(col_name) in then ON DUPLi CATE KEY UPDATE statement!Updates to other NEW.col_name in the BEFORE INSERT trigger that is not used in the values(col_name) statement are discarded. 2/b324a/1 If you have an autoincrement pk, and a unique key on say an email address, and the 'on duplicate update' triggers based on the email address, note that the last_insert_id' will NOT be the autoincrement value of the updated row.Recall that in My SQL, a primary key is simply a unique index named PRIMARY.