Thank you, OPC.THREE

create table T1(

SL int NOT NULL IDENTITY (1, 1),

ISDN varchar(13) NULL,

MSG varchar(50) NULL

)

insert into T1(ISDN,MSG) values ('123','ABC');

insert into T1(ISDN,MSG) values ('123','ABC');

insert into T1(ISDN,MSG) values ('123','XYZ');

insert into T1(ISDN,MSG) values ('124','XYZ');

insert into T1(ISDN,MSG) values ('124','EFG');

Now I wanna compare whether there is any similar row comprising ISDN and MSG columns.