drop table user_notification;
create table user_notification(
user_id  int NOT NULL IDENTITY(1,1),
registration_id varchar(1024) NOT NULL,
ua_channel_id  varchar(1024) NOT NULL,
email_id  varchar(40) NOT NULL,
platform  varchar(10) NOT NULL,
user_name varchar(40) NOT NULL,
push_notification_status  varchar(10) NOT NULL);

ALTER TABLE user_notification  ADD constraint PK_notification primary key (user_id );
