Re: How to compute the min and max of two numbers?
On Tue, 27 Apr 2010 09:08:29 Peng Yu wrote: I don't see there is a function to compute min or max of two numbers in a row. Essentially I want to select all the rows where the minimum of column1 and column2 are bigger than the maximum of col3 and col4 (The following code won't work as I expected, if I am correct). select * from a_table where min(col1, col2) = max(col3,col4) I think what you are looking for is GREATEST and LEAST. See also http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html#function_least and http://dev.mysql.com/doc/refman/5.1/en/comparison-operators.html#function_greatest Best regards, Jesper -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/mysql?unsub=arch...@jab.org
Re: How to compute the min and max of two numbers?
I want to select all the rows where the minimum of column1 and column2 are bigger than the maximum of col3 and col4 ... WHERE Least(col1,col2) Greatest(col3, col4) ... PB http://www.artfulsoftware.com - Peng Yu wrote: I don't see there is a function to compute min or max of two numbers in a row. Essentially I want to select all the rows where the minimum of column1 and column2 are bigger than the maximum of col3 and col4 (The following code won't work as I expected, if I am correct). select * from a_table where min(col1, col2) = max(col3,col4) I could expand the above expression to just using primitive comparisons. But it would not be very readable. I'm wondering if there is a better way to do so in sql. No virus found in this incoming message. Checked by AVG - www.avg.com Version: 8.5.437 / Virus Database: 271.1.1/2836 - Release Date: 04/26/10 06:31:00
