SQL> create table student_emails_ext
2 (firstname varchar(40),
3 lastname varchar(40),
4 email varchar(80) );
Table created.
SQL>
SQL> create table student_emails
2 as select * from student_emails_ext
3 where 0=1
4 /
Table created.
SQL>
SQL>
SQL> merge into student_emails s
2 using (select * from student_emails_ext) e
3 on (s.firstname = e.firstname and s.lastname = e.lastname)
4 when matched then
5 update set s.email = e.email
6 when not matched then
7 insert (s.firstname, s.lastname, s.email)
8 values(e.firstname , e.lastname, e.email);
0 rows merged.
SQL>
SQL> drop table student_emails_ext;
Table dropped.
SQL> drop table student_emails;
Table dropped.
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