Question

I have a table: tbl_offer (offer_name, location). For a particular offer I have more than one location in location column, separated by commas.

Example:

If offer is offer1 then I have Bangalore, Mumbai, Chennai in the location column.

Now want to write a query which will fetch each location separately (which are separated by commas for a particular offer). I want choose the offer1 it should fetch Bangalore Mumbai and Chennai in separate records.

Answer 1

As @Cylindric told you, if you can change database design!
Create two tables, one for offers and one for location.

OFFERS    (id, name)
LOCATIONS (offer_id, name)

So (for example) you have (1, 'offer1') in OFFERS and
(1, 'Bangalore'), (1, 'Mumbai') and (1, 'Chennai') in LOCATIONS.

Your query will be easier:

SELECT o.name, l.name FROM offers o
INNER JOIN locations l ON o.id = l.offer_id

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To be honest, you should have three tables to avoid locations repetitions:

OFFERS     (id, name)
LOCATIONS  (id, name)
OFFERS_LOC (offer_id, loc_id)

You have
(1, 'offer1') in OFFERS,
(1, 'Bangalore'), (2, 'Mumbai') and (3, 'Chennai') in LOCATIONS and
(1, 1), (1, 2) and (1, 3) in OFFERS_LOC.

Your query will be

SELECT o.name, l.name FROM offers o
INNER JOIN offers_loc ol ON o.id = ol.offer_id
INNER JOIN locations l ON ol.loc_id = l.id