Oracle PL/SQL/Table Joins/Right Outer Joins
Содержание
- 1 Group by and right join department id
- 2 Right join with where in clause
- 3 right outer join between department table and employee table
- 4 Right Outer Join, room table and class table
- 5 Right Outer Join(room vs class)
- 6 Right outer joins:return all the rows from the table on the right instead of the table on the left
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>
