How to get the expired candidates in MySQL - mysql

Question

I am having a table with the columns for expired_date and registered_date.
Expired date have set for 2 days to registered date.
Its look like this:
+--------------+--------------+---------------------+
| candidate_id | date_expires | date_added |
+--------------+--------------+---------------------+
| 1 | 2016-03-26 | 2016-03-24 14:42:18 |
| 2 | 2016-03-23 | 2016-03-21 15:43:40 |
| 3 | 2016-02-15 | 2016-02-13 14:53:30 |
| 4 | 2016-02-22 | 2016-02-20 14:54:19 |
+--------------+--------------+---------------------+
My question is, I want to select expired profile to current date and time.
This is how I tried it, but it doesn't work.
SELECT * FROM candidates WHERE date_added = DATE_ADD(date_added, INTERVAL 2 DAY);
Hope somebody may help me out.
Thank you.

Answer 1

You may try any of the following query which meets your need.
SELECT
*
FROM candidates
WHERE date_expires < CURDATE();
Or if you want to get the expired accounts with respect to date_added field then follow the query given below:
SELECT
*
FROM candidates
WHERE DATE_ADD(date_added, INTERVAL 2 DAY) < CURDATE();
EDIT:
For fine-grained comparison you may use the following query:
SELECT
*
FROM candidates
WHERE TIMESTAMPADD(DAY,2,date_added) < NOW();
Note: Actually you don't need to store the expired dates in database. Rather you can store the profile life time (in this case it is 2 Days) in database if this profile life time varies across different accounts. You don't need to store this in database if it's constant in nature (i.e. Always 2 DAYS).
So if you want to bring this change in your table structure then it would look like below:
+--------------+--------------+---------------------+
| candidate_id | days | date_added |
+--------------+--------------+---------------------+
| 1 | 2 | 2016-03-24 14:42:18 |
| 2 | 5 | 2016-03-21 15:43:40 |
| 3 | 3 | 2016-02-13 14:53:30 |
| 4 | 10 | 2016-02-20 14:54:19 |
+--------------+--------------+---------------------+
You need a modified query for this change.
Here it is:
SELECT
*
FROM candidates
WHERE TIMESTAMPADD(DAY,days,date_added) < NOW();

Answer 2

You're looking for this
SELECT *
FROM candidates
WHERE date_expires < NOW();