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Copy pathASS ON FUNCTIONS.txt
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ASS ON FUNCTIONS.txt
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SQL> SELECT ENAME
2 FROM EMP
3 WHERE LENGTH(ENAME)=4;
ENAME
----------
WARD
KING
FORD
SQL> SELECT JOB
2 FROM EMP
3 WHERE LENGTH(JOB)=7;
JOB
---------
MANAGER
MANAGER
MANAGER
ANALYST
ANALYST
SQL> SELECT INSTR('qspider','s',1,2) from emp;
INSTR('QSPIDER','S',1,2)
------------------------
0
0
0
0
0
0
0
0
0
0
0
0
0
0
14 rows selected.
SQL> ed
Wrote file afiedt.buf
1* SELECT INSTR('qspider','s',1,2) from dual
SQL> /
INSTR('QSPIDER','S',1,2)
------------------------
0
SQL> ed
Wrote file afiedt.buf
1* SELECT INSTR('qspider','s',1) from dual
SQL> /
INSTR('QSPIDER','S',1)
----------------------
2
SQL> SELECT length('qspiders') - (length(replace('qspiders','s')) from dual;
SELECT length('qspiders') - (length(replace('qspiders','s')) from dual
*
ERROR at line 1:
ORA-00907: missing right parenthesis
SQL> ed
Wrote file afiedt.buf
1* SELECT length('qspiders') - (length(replace('qspiders','s'))) from dual
SQL> /
LENGTH('QSPIDERS')-(LENGTH(REPLACE('QSPIDERS','S')))
----------------------------------------------------
2
SQL> SELECT JOB
2 FROM EMP
3 WHERE JOB IN(SELECT SUBSTR('MAN',-3) FROM EMP);
no rows selected
SQL> SELECT * FROM EMP;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80 800 20
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7566 JONES MANAGER 7839 02-APR-81 2975 20
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7782 CLARK MANAGER 7839 09-JUN-81 2450 10
7788 SCOTT ANALYST 7566 19-APR-87 3000 20
7839 KING PRESIDENT 17-NOV-81 5000 10
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7876 ADAMS CLERK 7788 23-MAY-87 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
7902 FORD ANALYST 7566 03-DEC-81 3000 20
7934 MILLER CLERK 7782 23-JAN-82 1300 10
14 rows selected.
SQL> SELECT JOB
2 FROM EMP
3 WHERE SUBSTR(JOB,-3)='MAN';
JOB
---------
SALESMAN
SALESMAN
SALESMAN
SALESMAN
SQL> ED
Wrote file afiedt.buf
1 SELECT JOB
2 FROM EMP
3* WHERE SUBSTR(JOB,1)='MAN'
SQL> /
no rows selected
SQL> ED
Wrote file afiedt.buf
1 SELECT JOB
2 FROM EMP
3* WHERE SUBSTR(JOB,1,3)='MAN'
SQL> /
JOB
---------
MANAGER
MANAGER
MANAGER
SQL> SELECT ENAME
2 FROM EMP
3 WHERE LENGTH(ENAME) - LENGTH(REPLACE(ENAME,'L'))=1;
ENAME
----------
BLAKE
CLARK
SQL> ED
Wrote file afiedt.buf
1 SELECT ENAME
2 FROM EMP
3 WHERE INSTR(ENAME,'L',1) > 0 AND
4* INSTR(ENAME,'L',1,2)=0
SQL> /
ENAME
----------
BLAKE
CLARK
SQL> SELECT DNAME
2 FROM EMP
3 WHERE INSTR(DNAME,'O',1) > 0;
WHERE INSTR(DNAME,'O',1) > 0
*
ERROR at line 3:
ORA-00904: "DNAME": invalid identifier
SQL> ED
Wrote file afiedt.buf
1 SELECT DNAME
2 FROM DEPT
3* WHERE INSTR(DNAME,'O',1) > 0
SQL> /
DNAME
--------------
ACCOUNTING
OPERATIONS
SQL> SELECT * FROM DEPT;
DEPTNO DNAME LOC
---------- -------------- -------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
SQL> SELECT CONCAT(ENAME ||'WORKING AS A'|| JOB || 'EARNS' || SAL || 'IN DEPT' || DEPTNO
2 FROM EMP;
SELECT CONCAT(ENAME ||'WORKING AS A'|| JOB || 'EARNS' || SAL || 'IN DEPT' || DEPTNO
*
ERROR at line 1:
ORA-00909: invalid number of arguments
SQL> SELECT CONCAT(ENAME,CONCAT('AS A',CONCAT(JOB,CONCAT('EARNS',CONCAT(SAL,CONCAT('IN DEPT',CONCAT(DEPTNO)))))))
2 FROM EMP;
SELECT CONCAT(ENAME,CONCAT('AS A',CONCAT(JOB,CONCAT('EARNS',CONCAT(SAL,CONCAT('IN DEPT',CONCAT(DEPTNO)))))))
*
ERROR at line 1:
ORA-00909: invalid number of arguments
SQL> ED
Wrote file afiedt.buf
1 SELECT CONCAT(ENAME,CONCAT('AS A',CONCAT(JOB,CONCAT('EARNS',CONCAT(SAL,CONCAT('IN DEPT',CONCAT(DEPTNO)))))))
2 FROM EMP
3* WHERE ENAME='SCOTT'
SQL> /
SELECT CONCAT(ENAME,CONCAT('AS A',CONCAT(JOB,CONCAT('EARNS',CONCAT(SAL,CONCAT('IN DEPT',CONCAT(DEPTNO)))))))
*
ERROR at line 1:
ORA-00909: invalid number of arguments
SQL> SELECT CONCAT(ENAME,'WORKING AS A',JOB,'EARNS',SAL,'IN DEPT',DEPTNO);
SELECT CONCAT(ENAME,'WORKING AS A',JOB,'EARNS',SAL,'IN DEPT',DEPTNO)
*
ERROR at line 1:
ORA-00909: invalid number of arguments
SQL> ED
Wrote file afiedt.buf
1 SELECT CONCAT(ENAME,'WORKING AS A',JOB,'EARNS',SAL,'IN DEPT',DEPTNO)
2 FROM EMP
3* WHERE ENAME='SCOTT'
SQL> /
SELECT CONCAT(ENAME,'WORKING AS A',JOB,'EARNS',SAL,'IN DEPT',DEPTNO)
*
ERROR at line 1:
ORA-00909: invalid number of arguments
SQL> SELECT LENGTH('HELLLLL') - LENGTH(REPLACE('HELLLLL','L'))) FROM DUAL;
SELECT LENGTH('HELLLLL') - LENGTH(REPLACE('HELLLLL','L'))) FROM DUAL
*
ERROR at line 1:
ORA-00923: FROM keyword not found where expected
SQL> ED
Wrote file afiedt.buf
1* SELECT LENGTH('HELLLLL') - LENGTH(REPLACE('HELLLLL','L')) FROM DUAL
SQL> /
LENGTH('HELLLLL')-LENGTH(REPLACE('HELLLLL','L'))
------------------------------------------------
5
SQL> SELECT JOB
2 FROM EMP
3 WHERE INSTR(JOB,'MAN',1) > 0;
JOB
---------
SALESMAN
SALESMAN
MANAGER
SALESMAN
MANAGER
MANAGER
SALESMAN
7 rows selected.
SQL> ED
Wrote file afiedt.buf
1 SELECT ENAME,JOB
2 FROM EMP
3* WHERE INSTR(JOB,'MAN',1) > 0
SQL> /
ENAME JOB
---------- ---------
ALLEN SALESMAN
WARD SALESMAN
JONES MANAGER
MARTIN SALESMAN
BLAKE MANAGER
CLARK MANAGER
TURNER SALESMAN
7 rows selected.
SQL> SELECT ENAME
2 FROM EMP
3 WHERE SUBSTR(JOB,1)='MAN';
no rows selected
SQL> ED
Wrote file afiedt.buf
1 SELECT ENAME,JOB
2 FROM EMP
3* WHERE SUBSTR(JOB,1,3)='MAN'
SQL> /
ENAME JOB
---------- ---------
JONES MANAGER
BLAKE MANAGER
CLARK MANAGER
SQL> ED
Wrote file afiedt.buf
1 SELECT ENAME,JOB
2 FROM EMP
3* WHERE SUBSTR(JOB,1,-3)='MAN'
SQL> /
no rows selected
SQL> ED
Wrote file afiedt.buf
1 SELECT ENAME,JOB
2 FROM EMP
3* WHERE SUBSTR(JOB,-3)='MAN'
SQL> /
ENAME JOB
---------- ---------
ALLEN SALESMAN