- Create tables
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create table CLIENT_TABLE_OLD(
CLIENTID number(19)
);
create table CLIENT_TABLE_NEW(
CLIENTID number(19) primary key
);
- insert data into tables
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insert into CLIENT_TABLE_NEW (CLIENTID) values(1);
insert into CLIENT_TABLE_NEW (CLIENTID) values(2);
insert into CLIENT_TABLE_NEW (CLIENTID) values(3);
insert into CLIENT_TABLE_NEW (CLIENTID) values(4);
insert into CLIENT_TABLE_NEW (CLIENTID) values(5);
insert into CLIENT_TABLE_OLD (CLIENTID) values(4);
insert into CLIENT_TABLE_OLD (CLIENTID) values(5);
insert into CLIENT_TABLE_OLD (CLIENTID) values(6);
insert into CLIENT_TABLE_OLD (CLIENTID) values(7);
insert into CLIENT_TABLE_OLD (CLIENTID) values(8);
- Find all unique records that are present in both the tables
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select clientid from CLIENT_TABLE_NEW
union
select clientid from CLIENT_TABLE_OLD;
CLIENTID
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Cleanup
- Drop tables
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drop table CLIENT_TABLE_OLD;
drop table CLIENT_TABLE_NEW;