display day through stored procedure

问题

I have an problem in MySQL stored procedure

table tbl_teachers:

id           dat_teacher_doj   fk_int_dept_id

1            1982-01-10          1
2            1979-09-01          1
3            1981-10-13          1

here i need to create an stored procedure to find out the joining date of teachers and if it is a Monday it should display Monday else it should display “Weekday” ? i need the answer like:

call check-date (1982-01-10) ->day weekday

回答1:

just CASE expression with the help of DAYNAME

SELECT id, dat_teacher_doj,
       CASE DAYNAME(dat_teacher_doj) WHEN 'Monday' THEN 'Monday' ELSE 'Weekday' END
FROM   tbl_teachers

Procedure:this will work in localhost phpmyadmin as well as workbench

CREATE PROCEDURE `GetWeekDay`(IN `paramDate` DATE)
 NO SQL 
SELECT CASE DAYNAME(paramDate) WHEN 'Monday' THEN 'Monday' ELSE 'Weekday' END AS 'WkDy' 

Call

CALL `GetWeekDay`('2015-08-03');

回答2:

You don't need a stored procedure for this. A simple case expression around a dayofweek call should do the trick:

SELECT id, dat_teacher_doj,
       CASE DAYOFWEEK(dat_teacher_doj) WHEN 2 THEN 'Monday' ELSE 'Weekday' END
FROM   tbl_teachers

来源：https://stackoverflow.com/questions/31769551/display-day-through-stored-procedure