DAYNAME Function - SQL
Overview
The DAYNAME function in SQL returns the name of the weekday for a given date. It is useful for retrieving the day of the week from a date expression.
Example:
SELECT
DAYNAME('2000-01-01')
Syntax:
SELECT
DAYNAME(date)
date is the date from which you want to extract the name of the weekday.
Sample Data:
| first_name | birthday |
|---|---|
| Frank | 1994-03-15 00:00:00 |
| Jane | 1980-06-14 00:00:00 |
| Ashley | 1975-12-05 00:00:00 |
| Glenn | 1988-03-23 00:00:00 |
| Kelly | 1979-10-11 00:00:00 |
| Richard | 1985-08-30 00:00:00 |
| George | 1992-02-18 00:00:00 |
| Kyle | 1983-04-07 00:00:00 |
| James | 1978-09-27 00:00:00 |
| Gustavo | 1987-11-21 00:00:00 |
Example: Hard-coded value
In this example, we are returning the name of the weekday for the date ‘2000-01-01,’ the final output is ‘Saturday.’
Example: Query without the WHERE Statement
In this example, we are returning the name of the weekday for all of the rows in the birthday column.
Example: Query with the WHERE Statement
In this example, we are returning the name of the weekday for the rows in the birthday column where the first_name column equals ‘Kelly.’
