Update MySQL table and ignore duplicate entries

Question

I created a table that contains a UNIQUE \'mobile_no\' like

09727048248
9727048248
9824578564
9898998998

Then I am going to check whether o

Answer 1

If you have declared the mobile number as the primary key in your table, then you can’t have the same mobile number twice in your table. Have a look at the MySQL UPDATE documentation.

Answer 2

Use UPDATE IGNORE:

update IGNORE bccontacts 
set mobile_no='919727048248' 
where mobile_no=09727048248

More info here: http://dev.mysql.com/doc/refman/5.0/en/update.html