в 13:45, 26 мая 2010

2010-05-26T13:45:19Z

Admin: 1 версия

2010-05-26T09:54:35Z

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==Group by and right join department id==



<source lang="sql">

SQL>
SQL> create table emp
2 ( empno NUMBER(4) constraint E_PK primary key
3 , ename VARCHAR2(8)
4 , init VARCHAR2(5)
5 , job VARCHAR2(8)
6 , mgr NUMBER(4)
7 , bdate DATE
8 , sal NUMBER(6,2)
9 , comm NUMBER(6,2)
10 , deptno NUMBER(2) default 10
11 ) ;
Table created.
SQL> insert into emp values(1,"Tom","N", "TRAINER", 13,date "1965-12-17", 800 , NULL, 20);
1 row created.
SQL> insert into emp values(2,"Jack","JAM", "Tester",6,date "1961-02-20", 1600, 300, 30);
1 row created.
SQL> insert into emp values(3,"Wil","TF" , "Tester",6,date "1962-02-22", 1250, 500, 30);
1 row created.
SQL> insert into emp values(4,"Jane","JM", "Designer", 9,date "1967-04-02", 2975, NULL, 20);
1 row created.
SQL> insert into emp values(5,"Mary","P", "Tester",6,date "1956-09-28", 1250, 1400, 30);
1 row created.
SQL> insert into emp values(6,"Black","R", "Designer", 9,date "1963-11-01", 2850, NULL, 30);
1 row created.
SQL> insert into emp values(7,"Chris","AB", "Designer", 9,date "1965-06-09", 2450, NULL, 10);
1 row created.
SQL> insert into emp values(8,"Smart","SCJ", "TRAINER", 4,date "1959-11-26", 3000, NULL, 20);
1 row created.
SQL> insert into emp values(9,"Peter","CC", "Designer",NULL,date "1952-11-17", 5000, NULL, 10);
1 row created.
SQL> insert into emp values(10,"Take","JJ", "Tester",6,date "1968-09-28", 1500, 0, 30);
1 row created.
SQL> insert into emp values(11,"Ana","AA", "TRAINER", 8,date "1966-12-30", 1100, NULL, 20);
1 row created.
SQL> insert into emp values(12,"Jane","R", "Manager", 6,date "1969-12-03", 800 , NULL, 30);
1 row created.
SQL> insert into emp values(13,"Fake","MG", "TRAINER", 4,date "1959-02-13", 3000, NULL, 20);
1 row created.
SQL> insert into emp values(14,"Mike","TJA","Manager", 7,date "1962-01-23", 1300, NULL, 10);
1 row created.
SQL>
SQL> create table departments
2 ( deptno NUMBER(2) constraint D_PK
3 primary key
4 , dname VARCHAR2(10)
5 , location VARCHAR2(8)
6 , mgr NUMBER(4)
7 ) ;
Table created.
SQL>
SQL> insert into departments values (10,"ACCOUNTING","NEW YORK",7);
1 row created.
SQL> insert into departments values (20,"TRAINING", "DALLAS", 4);
1 row created.
SQL> insert into departments values (30,"SALES", "CHICAGO", 6);
1 row created.
SQL> insert into departments values (40,"HR", "BOSTON", 9);
1 row created.
SQL>
SQL> select deptno, count(*)
2 from emp e
3 right outer join
4 departments d
5 using (deptno)
6 group by deptno;
DEPTNO COUNT(*)
---------- ----------
10 3
20 5
30 6
40 1
SQL>
SQL> drop table emp;
Table dropped.
SQL> drop table departments;
Table dropped.
SQL>

</source>

==Right join with where in clause==



<source lang="sql">

SQL>
SQL>
SQL> CREATE TABLE emp
2 (
3 cid NUMBER,
4 lname VARCHAR2(40) ,
5 city VARCHAR2(30) ,
6 customer_state VARCHAR2(40),
7 country_id CHAR(2) ,
8 customer_credit NUMBER
9 );
Table created.
SQL>
SQL> CREATE TABLE sales(
2 product_id NUMBER(6),
3 cid NUMBER,
4 time_id DATE,
5 channel_id CHAR(1),
6 promo_id NUMBER(6),
7 sold NUMBER(3),
8 amount NUMBER(10,2),
9 cost NUMBER(10,2)
10 );
Table created.
SQL>
SQL>
SQL>
SQL> select c.cid, c.lname, s.product_id, s.sold
2 from sales s right join emp c
3 on c.cid = s.cid
4 where c.cid in (1,80);
no rows selected
SQL>
SQL> drop table sales;
Table dropped.
SQL> drop table emp;
Table dropped.
SQL>
SQL>

</source>

==right outer join between department table and employee table==



<source lang="sql">

SQL>
SQL> CREATE TABLE departments
2 (department_id number(10) not null,
3 department_name varchar2(50) not null,
4 CONSTRAINT departments_pk PRIMARY KEY (department_id)
5 );
Table created.
SQL>
SQL>
SQL>
SQL> insert into departments ( department_id, department_name )
2 values( 1, "Data Group" );
1 row created.
SQL>
SQL> insert into departments ( department_id, department_name )
2 values( 2, "Purchasing" );
1 row created.
SQL>
SQL> insert into departments ( department_id, department_name )
2 values( 3, "Call Center" );
1 row created.
SQL>
SQL> insert into departments ( department_id, department_name )
2 values( 4, "Communication" );
1 row created.
SQL>
SQL>
SQL>
SQL> CREATE TABLE employees
2 ( employee_id number(10) not null,
3 last_name varchar2(50) not null,
4 email varchar2(30),
5 hire_date date,
6 job_id varchar2(30),
7 department_id number(10),
8 salary number(6),
9 manager_id number(6),
10 CONSTRAINT employees_pk PRIMARY KEY (employee_id),
11 CONSTRAINT fk_departments FOREIGN KEY (department_id) REFERENCES departments(department_id)
12 );
Table created.
SQL>
SQL>
SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary,department_id ,manager_id)
2 values ( 1001, "Lawson", "lawson@g.ru", "01-JAN-2002","MGR", 30000,1 ,1004);
1 row created.
SQL>
SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id ,manager_id)
2 values ( 1002, "Wells", "wells@g.ru", "01-JAN-2002", "DBA", 20000,2, 1005 );
1 row created.
SQL>
SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id ,manager_id)
2 values( 1003, "Bliss", "bliss@g.ru", "01-JAN-2002", "PROG", 24000,3 ,1004);
1 row created.
SQL>
SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id, manager_id)
2 values( 1004, "Kyte", "tkyte@a.ru", SYSDATE-3650, "MGR",25000 ,4, 1005);
1 row created.
SQL>
SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id, manager_id)
2 values( 1005, "Viper", "sdillon@a .ru", SYSDATE, "PROG", 20000, 1, 1006);
1 row created.
SQL>
SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id,manager_id)
2 values( 1006, "Beck", "clbeck@g.ru", SYSDATE, "PROG", 20000, 2, null);
1 row created.
SQL>
SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id, manager_id)
2 values( 1007, "Java", "java01@g.ru", SYSDATE, "PROG", 20000, 3, 1006);
1 row created.
SQL>
SQL> insert into employees( employee_id, last_name, email, hire_date, job_id, salary, department_id, manager_id)
2 values( 1008, "Oracle", "wvelasq@g.ru", SYSDATE, "DBA", 20000, 4, 1006);
1 row created.
SQL>
SQL> select * from employees;
EMPLOYEE_ID LAST_NAME EMAIL HIRE_DATE JOB_ID DEPARTMENT_ID SALARY MANAGER_ID
----------- -------------------------------------------------- ------------------------------ --------- ------------------------------ ------------- ---------- ----------
1001 Lawson lawson@g.ru 01-JAN-02 MGR 1 30000 1004
1002 Wells wells@g.ru 01-JAN-02 DBA 2 20000 1005
1003 Bliss bliss@g.ru 01-JAN-02 PROG 3 24000 1004
1004 Kyte tkyte@a.ru 13-JUN-98 MGR 4 25000 1005
1005 Viper sdillon@a .ru 10-JUN-08 PROG 1 20000 1006
1006 Beck clbeck@g.ru 10-JUN-08 PROG 2 20000
1007 Java java01@g.ru 10-JUN-08 PROG 3 20000 1006
EMPLOYEE_ID LAST_NAME EMAIL HIRE_DATE JOB_ID DEPARTMENT_ID SALARY MANAGER_ID
----------- -------------------------------------------------- ------------------------------ --------- ------------------------------ ------------- ---------- ----------
1008 Oracle wvelasq@g.ru 10-JUN-08 DBA 4 20000 1006
8 rows selected.
SQL>
SQL> select * from departments;
DEPARTMENT_ID DEPARTMENT_NA
------------- -------------
1 Data Group
2 Purchasing
3 Call Center
4 Communication
4 rows selected.
SQL>
SQL>
SQL> select e.employee_id, e.last_name, d.department_name
2 from employees e right outer join departments d
3 on e.department_id = d.department_id
4 where d.department_name = "Purchasing"
5 order by d.department_name, e.last_name
6 /
EMPLOYEE_ID LAST_NAME DEPARTMENT_NA
----------- -------------------------------------------------- -------------
1006 Beck Purchasing
1002 Wells Purchasing
SQL>
SQL>
SQL> drop table employees cascade constraints;
Table dropped.
SQL> drop table departments cascade constraints;
Table dropped.

</source>

==Right Outer Join, room table and class table==



<source lang="sql">

SQL>
SQL>
SQL> CREATE TABLE Room (
2 RoomID INT NOT NULL PRIMARY KEY,
3 Comments VARCHAR(50),
4 Capacity INT);
Table created.
SQL> INSERT INTO Room (RoomID,Comments,Capacity) VALUES (1,"Main hall",500);
1 row created.
SQL> INSERT INTO Room (RoomID,Comments,Capacity) VALUES (2,"Science Department",200);
1 row created.
SQL> INSERT INTO Room (RoomID,Comments,Capacity) VALUES (3,"Science Room 1",100);
1 row created.
SQL> INSERT INTO Room (RoomID,Comments,Capacity) VALUES (4,"Languages Block",300);
1 row created.
SQL>
SQL>
SQL>
SQL> CREATE TABLE Class (
2 ClassID INT NOT NULL PRIMARY KEY,
3 CourseID INT NOT NULL,
4 InstructorID INT NOT NULL,
5 RoomID INT NOT NULL,
6 Time VARCHAR(50));
Table created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (1,1,1,6,"Mon 09:00-11:00");
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (2,2,1,5,"Mon 11:00-12:00, Thu 09:00-11:00");
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (3,3,2,3,"Mon 14:00-16:00");
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (4,4,3,2,"Tue 10:00-12:00, Thu 14:00-15:00");
1 row created.
SQL>
SQL>
SQL>
SQL> SELECT Room.RoomID, Class.Time
2 FROM Room
3 RIGHT OUTER JOIN Class
4 ON Room.RoomID = Class.RoomID
5 ORDER BY Room.RoomID;
ROOMID TIME
---------- --------------------------------------------------
2 Tue 10:00-12:00, Thu 14:00-15:00
3 Mon 14:00-16:00
Mon 09:00-11:00
Mon 11:00-12:00, Thu 09:00-11:00
4 rows selected.
SQL>
SQL> drop table Room;
Table dropped.
SQL> drop table Class;
Table dropped.

</source>

==Right Outer Join(room vs class)==



<source lang="sql">

SQL>
SQL>
SQL> CREATE TABLE Room (
2 RoomID INT NOT NULL PRIMARY KEY,
3 Comments VARCHAR(50),
4 Capacity INT);
Table created.
SQL> INSERT INTO Room (RoomID,Comments,Capacity) VALUES (1,"Main hall",500);
1 row created.
SQL> INSERT INTO Room (RoomID,Comments,Capacity) VALUES (2,"Science Department",200);
1 row created.
SQL> INSERT INTO Room (RoomID,Comments,Capacity) VALUES (3,"Science Room 1",100);
1 row created.
SQL> INSERT INTO Room (RoomID,Comments,Capacity) VALUES (4,"Languages Block",300);
1 row created.
SQL> INSERT INTO Room (RoomID,Comments,Capacity) VALUES (5,"Languages Room 1",75);
1 row created.
SQL>
SQL>
SQL>
SQL> CREATE TABLE Class (
2 ClassID INT NOT NULL PRIMARY KEY,
3 CourseID INT NOT NULL,
4 InstructorID INT NOT NULL,
5 RoomID INT NOT NULL,
6 Time VARCHAR(50));
Table created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (1,1,1,6,"Mon 09:00-11:00");
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (2,2,1,5,"Mon 11:00-12:00, Thu 09:00-11:00");
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (3,3,2,3,"Mon 14:00-16:00");
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (4,4,3,2,"Tue 10:00-12:00, Thu 14:00-15:00");
1 row created.
SQL> INSERT INTO Class (ClassID,CourseID,InstructorID,RoomID,Time) VALUES (5,5,2,9,"Tue 14:00-16:00");
1 row created.
SQL>
SQL>
SQL>
SQL> SELECT Room.RoomID, Class.Time
2 FROM Class
3 RIGHT OUTER JOIN Room
4 ON Class.RoomID = Room.RoomID
5 ORDER BY Room.RoomID;
ROOMID TIME
---------- --------------------------------------------------
1
2 Tue 10:00-12:00, Thu 14:00-15:00
3 Mon 14:00-16:00
4
5 Mon 11:00-12:00, Thu 09:00-11:00
5 rows selected.
SQL>
SQL> drop table Room;
Table dropped.
SQL> drop table Class;
Table dropped.

</source>

==Right outer joins:return all the rows from the table on the right instead of the table on the left==



<source lang="sql">

SQL> CREATE TABLE EMP (EMPNO NUMBER(4) NOT NULL,
2 ENAME VARCHAR2(10),
3 JOB VARCHAR2(9),
4 MGR NUMBER(4),
5 HIREDATE DATE,
6 SAL NUMBER(7, 2),
7 COMM NUMBER(7, 2),
8 DEPTNO NUMBER(2));
Table created.
SQL>
SQL> INSERT INTO EMP VALUES (7369, "SMITH", "CLERK", 7902, TO_DATE("17-DEC-1980", "DD-MON-YYYY"), 800, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7499, "ALLEN", "SALESMAN", 7698, TO_DATE("20-FEB-1981", "DD-MON-YYYY"), 1600, 300, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7521, "WARD", "SALESMAN", 7698, TO_DATE("22-FEB-1981", "DD-MON-YYYY"), 1250, 500, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7566, "JONES", "MANAGER", 7839, TO_DATE("2-APR-1981", "DD-MON-YYYY"), 2975, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7654, "MARTIN", "SALESMAN", 7698,TO_DATE("28-SEP-1981", "DD-MON-YYYY"), 1250, 1400, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7698, "BLAKE", "MANAGER", 7839,TO_DATE("1-MAY-1981", "DD-MON-YYYY"), 2850, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7782, "CLARK", "MANAGER", 7839,TO_DATE("9-JUN-1981", "DD-MON-YYYY"), 2450, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7788, "SCOTT", "ANALYST", 7566,TO_DATE("09-DEC-1982", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7839, "KING", "PRESIDENT", NULL,TO_DATE("17-NOV-1981", "DD-MON-YYYY"), 5000, NULL, 10);
1 row created.
SQL> INSERT INTO EMP VALUES (7844, "TURNER", "SALESMAN", 7698,TO_DATE("8-SEP-1981", "DD-MON-YYYY"), 1500, 0, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7876, "ADAMS", "CLERK", 7788,TO_DATE("12-JAN-1983", "DD-MON-YYYY"), 1100, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7900, "JAMES", "CLERK", 7698,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 950, NULL, 30);
1 row created.
SQL> INSERT INTO EMP VALUES (7902, "FORD", "ANALYST", 7566,TO_DATE("3-DEC-1981", "DD-MON-YYYY"), 3000, NULL, 20);
1 row created.
SQL> INSERT INTO EMP VALUES (7934, "MILLER", "CLERK", 7782,TO_DATE("23-JAN-1982", "DD-MON-YYYY"), 1300, NULL, 10);
1 row created.
SQL>
SQL> CREATE TABLE DEPT (DEPTNO NUMBER(2),DNAME VARCHAR2(14),LOC VARCHAR2(13) );
Table created.
SQL>
SQL> INSERT INTO DEPT VALUES (10, "ACCOUNTING", "NEW YORK");
1 row created.
SQL> INSERT INTO DEPT VALUES (20, "RESEARCH", "DALLAS");
1 row created.
SQL> INSERT INTO DEPT VALUES (30, "SALES", "CHICAGO");
1 row created.
SQL> INSERT INTO DEPT VALUES (40, "OPERATIONS", "BOSTON");
1 row created.
SQL>
SQL>
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 09-DEC-82 3000 20
7839 KING PRESIDENT 17-NOV-81 5000 10
7844 TURNER SALESMAN 7698 08-SEP-81 1500 0 30
7876 ADAMS CLERK 7788 12-JAN-83 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>
SQL> select * from dept;
DEPTNO DNAME LOC
---------- -------------- -------------
10 ACCOUNTING NEW YORK
20 RESEARCH DALLAS
30 SALES CHICAGO
40 OPERATIONS BOSTON
SQL>
SQL>
SQL>
SQL> -- right outer joins.
SQL> -- return all the rows from the table on the right of the join condition instead of the
table on the left.
SQL>
SQL> select e.empno, e.ename, d.dname
2 from emp e right outer join dept d
3 on e.deptno = d.deptno
4 where d.loc = "CHICAGO"
5 order by d.dname, e.ename;
EMPNO ENAME DNAME
---------- ---------- --------------
7499 ALLEN SALES
7698 BLAKE SALES
7900 JAMES SALES
7654 MARTIN SALES
7844 TURNER SALES
7521 WARD SALES
6 rows selected.
SQL>
SQL>
SQL> drop table dept;
Table dropped.
SQL> drop table emp;
Table dropped.
SQL>
SQL>
SQL>
SQL>
SQL>

</source>

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в 13:45, 26 мая 2010

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