I have a DATE column with dates in 2012-02-25 format.I need to update it to 12-02-25 but am not sure how to go about it? Edit: After reviewing all the answers, it seems I have not been clear enough.I was not able, using my SQL 4.1.1, to do this as a subquery: UPDATE Groups LEFT JOIN (SELECT Group Id, MIN(Val Within Group) AS base Val FROM Groups GROUP BY Group Id) AS Grp Sum USING (Group Id) SET Val Within Group=Val Within Group-base Val; Csaba Gabor UPDATE Syntax with "on-line" updating value limitations.I had a problem - a had to update a column "rate" but if the existince or new value is greater then 5 this "5" will be finally value in field.This will use the SQL UPDATE command with the WHERE clause to update the selected data in the My SQL table tutorials_tbl.The following example will update the tutorial_title field for a record having the tutorial_id as 3.
If you access a column from the table to be updated in an expression, assignments are generally evaluated from left to right.I do not wish to change my type, nor do I wish to play with the output.I want to update the existing date column from 2012 to 12.If UPDATE gives an error like this:"You are using safe update mode and you tried to update a table without.."..it may be that your file must be edited to disable safemode. In order for the change in the file to take effect, you must have permission to restart mysqld in the server OS environment.There is a page in the online documentation that explains safe mode entitled 'safe Server Startup Script'.It should be an UPDATE query if anything, I'm just not sure how to write it. Edit 2: It seems my question did not make sense, I was not aware you could not store DATE as xx-xx-xx. Date values with two-digit years are ambiguous because the century is unknown.Such values must be interpreted into four-digit form because My SQL stores years internally using four digits.For YEAR, the rules are the same, with this exception: A numeric 00 inserted into YEAR(4) results in 0000 rather than 2000.To specify zero for YEAR(4) and have it be interpreted as 2000, specify it as a string '0' or '00'.Only the partitions (or subpartitions) listed are checked for matches, and a row that is not in any of these partitions or subpartitions is not updated, whether it satisfies the clause, are flagged as unsafe for statement-based replication.(This is because the order in which the rows are updated determines which rows are ignored.) 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 mode.