Christo Kutrovsky
Member³
When there's only one column, and it has NULL in it, PL/SQL deeloper's command window doesn't show it properly.
SQL> insert into kutro values (1);
1 row inserted
SQL> insert into kutro values (2);
1 row inserted
SQL> insert into kutro values (NULL);
1 row inserted
SQL> select * from kutro order by 1 desc;
A
----------
2
1
SQL> select * from kutro order by 1;
A
----------
1
2
SQL> select * from kutro order by 1 nulls first;
A
----------
1
2
SQL> select t.*, 'AAA' from kutro t order by 1;
A 'AAA'
---------- -----
1 AAA
2 AAA
AAA
SQL> select t.*, 'AAA' from kutro t order by 1 desc;
A 'AAA'
---------- -----
AAA
2 AAA
1 AAA
SQL>
SQL> insert into kutro values (1);
1 row inserted
SQL> insert into kutro values (2);
1 row inserted
SQL> insert into kutro values (NULL);
1 row inserted
SQL> select * from kutro order by 1 desc;
A
----------
2
1
SQL> select * from kutro order by 1;
A
----------
1
2
SQL> select * from kutro order by 1 nulls first;
A
----------
1
2
SQL> select t.*, 'AAA' from kutro t order by 1;
A 'AAA'
---------- -----
1 AAA
2 AAA
AAA
SQL> select t.*, 'AAA' from kutro t order by 1 desc;
A 'AAA'
---------- -----
AAA
2 AAA
1 AAA
SQL>