Useful MySQL Queries

by bill - 2020-12-06 09:53:31 ( in education, tech, computers, internet) [php version] rebuild (1304)

"Common MySQL Queries. Extending Chapter 9 of Get it Done with MySQL 5&Up

Here's an example: Compute date from year, week number and weekday:

SET @yr 12, @wk=26, @day=0;
SELECT Str_To_Date( Concat(@yr,'-',@wk,'-',If(@day=7,0,@day) ), '%Y-%U-%w' ) AS Date;