Question

I have data like this

id | bookDate   | regisDate  | payDate    | status  
1  | 2001-12-31 | 2002-12-31 | 2003-12-31 | 1  
2  | 2001-12-31 | 2002-12-31 | 2003-12-31 | 2  
3  | 2001-12-31 | 2002-12-31 | 2003-12-31 | 3  

and i want the result is like this

id | date | status 
x  | x    | x

notice date field is reduced from 3 into 1 field. and the conditional is like this. if the status is 1 then take date from bookDate, if 2 take from regisDate, if 3 take from payDate

example for data with id 1, then the result of query will be like this

id | date       | status 
1  | 2001-12-31 | 1

it is possible do that in MySQL query?

Answer 1

You have case statements in MySQL.

SELECT id,
 CASE status
  WHEN 1 THEN bookDate
  WHEN 2 THEN regisDate
  WHEN 3 THEN payDate
 END
 AS date,
 status
 FROM table