The document discusses creating a sequence in Oracle SQL that increments by -2. It shows three failed attempts to create the sequence that result in errors, with the errors being that a descending sequence that cycles must specify a minimum value, the minimum value must be less than the maximum value, and the start value cannot be more than the maximum value.

1. 1DR. GIRIJA NARASIMHAN
Part 6- Create Sequence
ERROR

2. 2DR. GIRIJA NARASIMHAN
SQL> create sequence seq1
2 start with 20
3 increment by -2
4 maxvalue 2
5 cycle
6 nocache;
create sequence seq1
*
ERROR at line 1:
ORA-04014: descending sequences that CYCLE must specify
MINVALUE

3. 3DR. GIRIJA NARASIMHAN
SQL> create sequence seq1
2 start with 8
3 increment by -2
4 maxvalue 2
5 minvalue 6
6 cycle
7 nocache;
create sequence seq1
*
ERROR at line 1:
ORA-04004: MINVALUE must be less than MAXVALUE

4. SQL> create sequence seq1
2 start with 20
3 increment by -2
4 maxvalue 10
5 minvalue 8
6 cycle
7 nocache;
create sequence seq1
*
ERROR at line 1:
ORA-04008: START WITH cannot be more than MAXVALUE
4DR. GIRIJA NARASIMHAN