Sort only some columns

Question

Hello
As some users asked for this feature, I wrote a short AppleScript doing the job.
You may grab it from my iDisk:
<http://idisk.mac.com/koenigyvan-Public?view=web>
in the folder:
ForiWork:ForNumbers:
Download the item: sort_column.zip with a click on the small down arrow displayed near the right edge of the window.
Yvan KOENIG (from FRANCE lundi 5 mai 2008 10:39:49)

Answer 1

Something like:
SQL> CREATE TABLE t (cola NUMBER, colb NUMBER, colc VARCHAR2(10));
Table created.
SQL> ALTER TABLE t ADD CONSTRAINT t_unq UNIQUE (cola, colb);
Table altered.
SQL> INSERT INTO T VALUES(1,null, 'Cola 1');
1 row created.
SQL> INSERT INTO T VALUES(null, 1, 'Colb 1');
1 row created.
SQL> INSERT INTO T VALUES(1, null, 'Cola 1');
INSERT INTO T VALUES(1, null, 'Cola 1')
ERROR at line 1:
ORA-00001: unique constraint (OPS$ORACLE.T_UNQ) violatedYou could add NOT NULL constraints for column c and d if required.
John