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MySQL Cookbook
book

MySQL Cookbook

by Paul DuBois
October 2002
Intermediate to advanced content levelIntermediate to advanced
1024 pages
27h 26m
English
O'Reilly Media, Inc.
Content preview from MySQL Cookbook

Finding the Day of the Week for a Date

Problem

You want to know the day of the week a date falls on.

Solution

Use the DAYNAME( ) function.

Discussion

To determine the name of the day of the week for a given date, use DAYNAME( ):

mysql> SELECT CURDATE( ), DAYNAME(CURDATE( ));
+------------+--------------------+
| CURDATE( )  | DAYNAME(CURDATE( )) |
+------------+--------------------+
| 2002-07-15 | Monday             |
+------------+--------------------+

DAYNAME( ) is often useful in conjunction with other date-related techniques. For example, to find out the day of the week for the first of the month, use the first-of-month expression from earlier in the chapter as the argument to DAYNAME( ):

mysql> SET @d = CURDATE( );
mysql> SET @first = DATE_SUB(@d,INTERVAL DAYOFMONTH(@d)-1 DAY);
mysql> SELECT @d AS 'starting date',
    -> @first AS '1st of month date',
    -> DAYNAME(@first) AS '1st of month day';
+---------------+-------------------+------------------+
| starting date | 1st of month date | 1st of month day |
+---------------+-------------------+------------------+
| 2002-07-15    | 2002-07-01        | Monday           |
+---------------+-------------------+------------------+
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Publisher Resources

ISBN: 0596001452Catalog PageErrata