Question

trasaction table description field have some value it is worked fine.
description feild default value is NULL,its not works..

update transaction set domain='hiox.com',description=CONACT(description,',domain swapped from hioxindia.com to hiox.com') where id=23602

help me..

Answer 1

Use ifnull():

update `transaction` 
   set domain='hiox.com',
   description=CONCAT(ifnull(description, ''), ',domain swapped from hioxindia.com to hiox.com') 
where id=23602

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