This is my table schema, which have composite key (username,emailid,phone)
How to validate similar record not exist in the table.
Example
username emailid phone
abc test@one.com 123456789
abc test@one.com 123456789
abc test2@one.com 123456789
abc test@one.com 456789269
abc test2@one.com 456789269
abc test@one.com 123456789
How restrict last record inserted inthe above table.
validation should perform under three fields record.