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SQL_PRACTICE2.text
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SQL> SELECT * FROM EMP
2 WHERE SAL < (SELECT SAL FROM EMP WHERE ENAME='FORD');
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
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
7934 MILLER CLERK 7782 23-JAN-82 1300 10
11 rows selected.
SQL> SELECT * FROM EMP
2 WHERE HIREDATE < SELECT HIREDATE FROM EMP WHERE ENAME='SCOTT');
WHERE HIREDATE < SELECT HIREDATE FROM EMP WHERE ENAME='SCOTT')
*
ERROR at line 2:
ORA-00936: missing expression
SQL> SELECT * FROM EMP
2 WHERE HIREDATE < (SELECT HIREDATE FROM EMP WHERE ENAME='SCOTT');
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
7839 KING PRESIDENT 17-NOV-81 5000 10
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
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
12 rows selected.
SQL> SELECT * FROM EMP
2 WHERE HIREDATE BETWEEN '28-SEP-81' AND '03-DEC-81';
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7839 KING PRESIDENT 17-NOV-81 5000 10
7900 JAMES CLERK 7698 03-DEC-81 950 30
7902 FORD ANALYST 7566 03-DEC-81 3000 20
SQL> SELECT INITCAP(ENAME) FROM EMP;
INITCAP(EN
----------
Smith
Allen
Ward
Jones
Martin
Blake
Clark
Scott
King
Turner
Adams
James
Ford
Miller
14 rows selected.
SQL> SELECT INITCAP(ENAME) FROM EMP
2 WHERE ENAME LIKE 'J%' OR ENAME LIKE 'A%' OR ENAME LIKE 'M%';
INITCAP(EN
----------
Allen
Jones
Martin
Adams
James
Miller
6 rows selected.
SQL> SELECT * FROM EMP WHERE LENGTH(ENAME)=5;
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
7566 JONES MANAGER 7839 02-APR-81 2975 20
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
7876 ADAMS CLERK 7788 23-MAY-87 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
8 rows selected.
SQL> SELECT *
2 FROM EMP,DEPT;
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO DEPTNO DNAME LOC
---------- ---------- --------- ---------- --------- ---------- ---------- ---------- ---------- -------------- -------------
7369 SMITH CLERK 7902 17-DEC-80 800 20 10 ACCOUNTING NEW YORK
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30 10 ACCOUNTING NEW YORK
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30 10 ACCOUNTING NEW YORK
7566 JONES MANAGER 7839 02-APR-81 2975 20 10 ACCOUNTING NEW YORK
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30 10 ACCOUNTING NEW YORK
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30 10 ACCOUNTING NEW YORK
7782 CLARK MANAGER 7839 09-JUN-81 2450 10 10 ACCOUNTING NEW YORK
7788 SCOTT ANALYST 7566 19-APR-87 3000 20 10 ACCOUNTING NEW YORK
7839 KING PRESIDENT 17-NOV-81 5000 10 10 ACCOUNTING NEW YORK
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30 10 ACCOUNTING NEW YORK
7876 ADAMS CLERK 7788 23-MAY-87 1100 20 10 ACCOUNTING NEW YORK
7900 JAMES CLERK 7698 03-DEC-81 950 30 10 ACCOUNTING NEW YORK
7902 FORD ANALYST 7566 03-DEC-81 3000 20 10 ACCOUNTING NEW YORK
7934 MILLER CLERK 7782 23-JAN-82 1300 10 10 ACCOUNTING NEW YORK
7369 SMITH CLERK 7902 17-DEC-80 800 20 20 RESEARCH DALLAS
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30 20 RESEARCH DALLAS
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30 20 RESEARCH DALLAS
7566 JONES MANAGER 7839 02-APR-81 2975 20 20 RESEARCH DALLAS
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30 20 RESEARCH DALLAS
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30 20 RESEARCH DALLAS
7782 CLARK MANAGER 7839 09-JUN-81 2450 10 20 RESEARCH DALLAS
7788 SCOTT ANALYST 7566 19-APR-87 3000 20 20 RESEARCH DALLAS
7839 KING PRESIDENT 17-NOV-81 5000 10 20 RESEARCH DALLAS
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30 20 RESEARCH DALLAS
7876 ADAMS CLERK 7788 23-MAY-87 1100 20 20 RESEARCH DALLAS
7900 JAMES CLERK 7698 03-DEC-81 950 30 20 RESEARCH DALLAS
7902 FORD ANALYST 7566 03-DEC-81 3000 20 20 RESEARCH DALLAS
7934 MILLER CLERK 7782 23-JAN-82 1300 10 20 RESEARCH DALLAS
7369 SMITH CLERK 7902 17-DEC-80 800 20 30 SALES CHICAGO
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30 30 SALES CHICAGO
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30 30 SALES CHICAGO
7566 JONES MANAGER 7839 02-APR-81 2975 20 30 SALES CHICAGO
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30 30 SALES CHICAGO
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30 30 SALES CHICAGO
7782 CLARK MANAGER 7839 09-JUN-81 2450 10 30 SALES CHICAGO
7788 SCOTT ANALYST 7566 19-APR-87 3000 20 30 SALES CHICAGO
7839 KING PRESIDENT 17-NOV-81 5000 10 30 SALES CHICAGO
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30 30 SALES CHICAGO
7876 ADAMS CLERK 7788 23-MAY-87 1100 20 30 SALES CHICAGO
7900 JAMES CLERK 7698 03-DEC-81 950 30 30 SALES CHICAGO
7902 FORD ANALYST 7566 03-DEC-81 3000 20 30 SALES CHICAGO
7934 MILLER CLERK 7782 23-JAN-82 1300 10 30 SALES CHICAGO
7369 SMITH CLERK 7902 17-DEC-80 800 20 40 OPERATIONS BOSTON
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30 40 OPERATIONS BOSTON
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30 40 OPERATIONS BOSTON
7566 JONES MANAGER 7839 02-APR-81 2975 20 40 OPERATIONS BOSTON
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30 40 OPERATIONS BOSTON
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30 40 OPERATIONS BOSTON
7782 CLARK MANAGER 7839 09-JUN-81 2450 10 40 OPERATIONS BOSTON
7788 SCOTT ANALYST 7566 19-APR-87 3000 20 40 OPERATIONS BOSTON
7839 KING PRESIDENT 17-NOV-81 5000 10 40 OPERATIONS BOSTON
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30 40 OPERATIONS BOSTON
7876 ADAMS CLERK 7788 23-MAY-87 1100 20 40 OPERATIONS BOSTON
7900 JAMES CLERK 7698 03-DEC-81 950 30 40 OPERATIONS BOSTON
7902 FORD ANALYST 7566 03-DEC-81 3000 20 40 OPERATIONS BOSTON
7934 MILLER CLERK 7782 23-JAN-82 1300 10 40 OPERATIONS BOSTON
56 rows selected.
SQL> SELECT * FROM EMP
2 WHERE DEPTNO IN(SELECT DEPTNO FROM EMP WHERE ENAME='JAMES');
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7900 JAMES CLERK 7698 03-DEC-81 950 30
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7698 BLAKE MANAGER 7839 01-MAY-81 2850 30
7654 MARTIN SALESMAN 7698 28-SEP-81 1250 1400 30
7521 WARD SALESMAN 7698 22-FEB-81 1250 500 30
7499 ALLEN SALESMAN 7698 20-FEB-81 1600 300 30
6 rows selected.
SQL> SELECT * FROM EMP
2 WHERE SAL<=(SELECT SAL FROM EMP WHERE ENAME='ADAMS');
EMPNO ENAME JOB MGR HIREDATE SAL COMM DEPTNO
---------- ---------- --------- ---------- --------- ---------- ---------- ----------
7369 SMITH CLERK 7902 17-DEC-80 800 20
7876 ADAMS CLERK 7788 23-MAY-87 1100 20
7900 JAMES CLERK 7698 03-DEC-81 950 30
SQL> SELECT * FROM EMP
2 WHERE HIREDATE < SELECT HIREDATE FROM EMP WHERE ENAME='WARD');
WHERE HIREDATE < SELECT HIREDATE FROM EMP WHERE ENAME='WARD')
*
ERROR at line 2:
ORA-00936: missing expression
SQL> SELECT * FROM EMP
2 WHERE HIREDATE < ( SELECT HIREDATE FROM EMP WHERE ENAME='WARD');
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
SQL> SELECT ENAME FROM EMP
2 WHERE MGR=(SELECT EMPNO FROM EMP WHERE ENAME='BLAKE');
ENAME
----------
ALLEN
WARD
MARTIN
TURNER
JAMES
SQL> SELECT * FROM EMP
2
SQL> SPOOL OFF;