round(sqrt(sal),2) : ROUND « Numerical Math Functions « Oracle PL/SQL Tutorial

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Oracle PL/SQL Tutorial » Numerical Math Functions » ROUND 
14. 17. 12. round(sqrt(sal),2)
SQL> CREATE TABLE EMP(
  2      EMPNO NUMBER(4NOT NULL,
  3      ENAME VARCHAR2(10),
  4      JOB VARCHAR2(9),
  5      MGR NUMBER(4),
  6      HIREDATE DATE,
  7      SAL NUMBER(72),
  8      COMM NUMBER(72),
  9      DEPTNO NUMBER(2)
 10  );

Table created.

SQL>
SQL> INSERT INTO EMP VALUES(7369'SMITH', 'CLERK', 7902,TO_DATE('17-DEC-1980', 'DD-MON-YYYY'), 800, NULL, 20);

row created.

SQL> INSERT INTO EMP VALUES(7499'ALLEN', 'SALESMAN', 7698,TO_DATE('20-FEB-1981', 'DD-MON-YYYY'), 160030030);

row created.

SQL> INSERT INTO EMP VALUES(7521'WARD', 'SALESMAN', 7698,TO_DATE('22-FEB-1981', 'DD-MON-YYYY'), 125050030);

row created.

SQL> INSERT INTO EMP VALUES(7566'JONES', 'MANAGER', 7839,TO_DATE('2-APR-1981', 'DD-MON-YYYY'), 2975, NULL, 20);

row created.

SQL> INSERT INTO EMP VALUES(7654'MARTIN', 'SALESMAN', 7698,TO_DATE('28-SEP-1981', 'DD-MON-YYYY'), 1250140030);

row created.

SQL> INSERT INTO EMP VALUES(7698'BLAKE', 'MANAGER', 7839,TO_DATE('1-MAY-1981', 'DD-MON-YYYY'), 2850, NULL, 30);

row created.

SQL> INSERT INTO EMP VALUES(7782'CLARK', 'MANAGER', 7839,TO_DATE('9-JUN-1981', 'DD-MON-YYYY'), 2450, NULL, 10);

row created.

SQL> INSERT INTO EMP VALUES(7788'SCOTT', 'ANALYST', 7566,TO_DATE('09-DEC-1982', 'DD-MON-YYYY'), 3000, NULL, 20);

row created.

SQL> INSERT INTO EMP VALUES(7839'KING', 'PRESIDENT', NULL,TO_DATE('17-NOV-1981', 'DD-MON-YYYY'), 5000, NULL, 10);

row created.

SQL> INSERT INTO EMP VALUES(7844'TURNER', 'SALESMAN', 7698,TO_DATE('8-SEP-1981', 'DD-MON-YYYY'), 1500030);

row created.

SQL> INSERT INTO EMP VALUES(7876'ADAMS', 'CLERK', 7788,TO_DATE('12-JAN-1983', 'DD-MON-YYYY'), 1100, NULL, 20);

row created.

SQL> INSERT INTO EMP VALUES(7900'JAMES', 'CLERK', 7698,TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 950, NULL, 30);

row created.

SQL> INSERT INTO EMP VALUES(7902'FORD', 'ANALYST', 7566,TO_DATE('3-DEC-1981', 'DD-MON-YYYY'), 3000, NULL, 20);

row created.

SQL> INSERT INTO EMP VALUES(7934'MILLER', 'CLERK', 7782,TO_DATE('23-JAN-1982', 'DD-MON-YYYY'), 1300, NULL, 10);

row created.

SQL>
SQL>
SQL> select ename, sal, round(sqrt(sal),2"Bonus" from emp;

ENAME             SAL      Bonus
---------- ---------- ----------
SMITH             800      28.28
ALLEN            1600         40
WARD             1250      35.36
JONES            2975      54.54
MARTIN           1250      35.36
BLAKE            2850      53.39
CLARK            2450       49.5
SCOTT            3000      54.77
KING             5000      70.71
TURNER           1500      38.73
ADAMS            1100      33.17

ENAME             SAL      Bonus
---------- ---------- ----------
JAMES             950      30.82
FORD             3000      54.77
MILLER           1300      36.06

14 rows selected.

SQL>
SQL> drop table emp;

Table dropped.
14. 17. ROUND
14. 17. 1. ROUND(x, [y]) gets the result of rounding x an optional y decimal places.
14. 17. 2. ROUND column value
14. 17. 3. ROUND for negative value
14. 17. 4. ROUND may have a second argument to handle precision: means the distance to the right of the decimal point
14. 17. 5. The second argument of ROUND defaults to 0
14. 17. 6. The second argument of ROUND, precision, may be negative, which means displacement to the left of the decimal point
14. 17. 7. ROUND(5.75)
14. 17. 8. ROUND(5.75, 1)
14. 17. 9. ROUND(5.75, -1) (2)
14. 17. 10. ROUND(345.678,2) ROUND(345.678,-1) ROUND(345.678,-2)
14. 17. 11. Demonstrates the ROUND function
14. 17. 12. round(sqrt(sal),2)
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