-- clear columns
SQL>
SQL> -- create demo table
SQL> create table TestTable(
2 ID VARCHAR2(4 BYTE) NOT NULL,
3 MyName VARCHAR2(10 BYTE),
4 MyDate DATE,
5 MyNumber Number(8,2)
6 )
7 /
Table created.
SQL>
SQL>
SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19960711','YYYYMMDD'),12.12);
1 row created.
SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19970622','YYYYMMDD'),-12.12);
1 row created.
SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19980513','YYYYMMDD'),22.1);
1 row created.
SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19990624','YYYYMMDD'),-2.12);
1 row created.
SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('20000415','YYYYMMDD'),2.1);
1 row created.
SQL>
SQL>
SQL> select * from TestTable;
ID MYNAME MYDATE MYNUMBER
---- ---------- --------- ----------
1 Alison 11-JUL-96 12.12
1 Alison 22-JUN-97 -12.12
1 Alison 13-MAY-98 22.1
1 Alison 24-JUN-99 -2.12
1 Alison 15-APR-00 2.1
SQL>
SQL> -- Add dollar signs to the output
SQL>
SQL> COLUMN MyNumber FORMAT $990.99;
SQL>
SQL> SELECT * FROM TestTable;
ID MYNAME MYDATE MYNUMBER
---- ---------- --------- --------
1 Alison 11-JUL-96 $12.12
1 Alison 22-JUN-97 -$12.12
1 Alison 13-MAY-98 $22.10
1 Alison 24-JUN-99 -$2.12
1 Alison 15-APR-00 $2.10
SQL>
SQL>
SQL> COLUMN MyNumber FORMAT $990.99;
SQL>
SQL> SELECT * FROM TestTable;
ID MYNAME MYDATE MYNUMBER
---- ---------- --------- --------
1 Alison 11-JUL-96 $12.12
1 Alison 22-JUN-97 -$12.12
1 Alison 13-MAY-98 $22.10
1 Alison 24-JUN-99 -$2.12
1 Alison 15-APR-00 $2.10
SQL>
SQL> column mynumber clear;
SQL>
SQL> CLEAR COLUMNS;
columns cleared
SQL>
SQL> drop table TestTable;
Table dropped.
SQL>
SQL>
SQL>