Question

Consider i have a user table and I have three columns mobilePhone,homePhone and workPhone…

I have to select homePhone for every user as first pref

if there is no value

   I’ll go for mobilePhone and

   if there is no value for it

      I ll go for workPhone….

Any suggestion how it can be done in mysql..

Answer 1

Try using Sql Server COALESCE (Transact-SQL),

Returns the first nonnull expression
among its arguments.

Same goes for MySql COALESCE(value,…)

Returns the first non-NULL value in
the list, or NULL if there are no
non-NULL values.

Something like

SELECT  COALESCE(homePhone, mobilePhone, workPhone) ContactPhone
FROM    Users