SQL> CREATE TABLE LUNAR (
2 C1 char (4),
3 c2 varchar2 (20)
4)
5 /
The table has been created.
SQL> INSERT INTO LUNAR VALUES ('1111', '1111');
It has created a row.
SQL> INSERT INTO LUNAR VALUES ('1112', '1111');
It has created a row.
SQL> INSERT INTO LUNAR VALUES ('1113', '1111');
It has created a row.
SQL> INSERT INTO LUNAR VALUES ('1114', '1111');
It has created a row.
SQL> commit;
Submitted.
SQL>
Create Record:
SQL> INSERT INTO LUNAR SELECT * from Lunar;
4 lines have been created.
SQL> commit;
Submitted.
SQL> SELECT ROWID, C1, C2 from Lunar;
RowID C1 C2
----------------------------------------
Aaag / Oaagaaaaamaaaaa 1111 1111
Aaag / Oaagaaaaamaab 1112 1111
Aaag / Oaagaaaaamaac 1113 1111
Aaag / Oaagaaaaamaad 1114 1111
Aaag / Oaagaaaaaaaaaaaaaaaaaaaaaae 1111 1111
Aaag / Oaagaaaaaaaaf 1112 1111
Aaag / Oaagaaaaamaaag 1113 1111
Aaag / Oaagaaaaaaaa 1114 1111
8 lines have been selected.
SQL>
Isolated repeated record
SQL> SELECT ROWID, C1, C2
2 from lunar
3 where lunar.rowid! = (SELECT MAX (ROWID)
4 from Lunar B
5 WHERE LUNAR.C1 = B.c1 and lunar.c2 = b.c2);
RowID C1 C2
----------------------------------------
Aaag / Oaagaaaaamaaaaa 1111 1111
Aaag / Oaagaaaaamaab 1112 1111
Aaag / Oaagaaaaamaac 1113 1111
Aaag / Oaagaaaaamaad 1114 1111
SQL>
Delete Record:
SQL> Delete from Lunar A
2 WHERE A.ROWID! = (Select Max (RowID)
3 from Lunar B
4 WHERE A.C1 = B.c1 and a.c2 = b.c2);
4 lines have been deleted.
SQL> commit;
Submitted.
SQL> SELECT ROWID, C1, C2 from Lunar;
RowID C1 C2
----------------------------------------
Aaag / Oaagaaaaaaaaaaaaaaaaaaaaaae 1111 1111
Aaag / Oaagaaaaaaaaf 1112 1111
Aaag / Oaagaaaaamaaag 1113 1111
Aaag / Oaagaaaaaaaa 1114 1111
SQL>
