在MySQL中将周索引转换为天

Question

I have weekdays store like 1,2,3 instead of Sunday, Monday, Tuesday etc..(1= Sunday, 2 = Monday, …, 7 = Saturday).

now I want to retrieve like Sunday, monday instead 1 and 2 I tried using DATE_FORMAT(date,format).. but no success.

Answer 1

Just use a case statement:

select (case day when 1 then 'Sunday'
                 when 2 then 'Monday'
                 when 3 then 'Tuesday'
                 when 4 then 'Wednesday'
                 when 5 then 'Thursday'
                 when 6 then 'Friday'
                 when 7 then 'Saturday'
        end) as DayOfWeek

Or, in MySQL, you can also use ELT() :

select elt(day, 'Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday')