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('3','Smith',to_date('19980513','YYYYMMDD'),22.1);
1 row created.
SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('5','Darlene',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
3 Smith 13-MAY-98 22.1
5 Darlene 15-APR-00 2.1
SQL>
SQL>
SQL> SELECT MyNumber, SQRT(MyNumber) FROM TestTable;
MYNUMBER SQRT(MYNUMBER)
---------- --------------
12.12 3.48137904
22.1 4.70106371
2.1 1.44913767
SQL>
SQL>
SQL> drop table TestTable;
Table dropped.
SQL>
SQL>