The query shows that the join is performed with the other WHERE conditions : Table Join Basics « Table Joins « Oracle PL / SQL

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Oracle PL / SQL » Table Joins » Table Join Basics 
The query shows that the join is performed with the other WHERE conditions
   


SQL>
SQL> -- create demo table
SQL> create table Employee(
  2    empno              Number(3)  NOT NULL, -- Employee ID
  3    ename              VARCHAR2(10 BYTE),   -- Employee Name
  4    hireDate          DATE,                -- Date Employee Hired
  5    orig_salary        Number(8,2),         -- Orignal Salary
  6    curr_salary        Number(8,2),         -- Current Salary
  7    region             VARCHAR2(BYTE)     -- Region where employeed
  8  )
  9  /

Table created.

SQL>
SQL> create table job(
  2    empno              Number(3)  NOT NULL, -- Employee ID
  3    jobtitle           VARCHAR2(10 BYTE)    -- Employee job title
  4  )
  5  /

Table created.

SQL> -- prepare data for employee table
SQL> insert into Employee(empno,  ename,  hireDate,                       orig_salary, curr_salary, region)
  2               values (101,'Jason',to_date('19960725','YYYYMMDD'), 34000,        44000        'W')
  3  /
             values (101,'Jason',to_date('19960725','YYYYMMDD'), 34000,        44000        'W')
                                                                                            *
ERROR at line 2:
ORA-00917: missing comma


SQL> insert into Employee(empno,  ename,  hireDate,                       orig_salary, curr_salary, region)
  2                values(122,'Alison',to_date('19960321','YYYYMMDD'), 45000,       48000,       'E')
  3  /

row created.

SQL> insert into Employee(empno,  ename,  hireDate,                       orig_salary, curr_salary, region)
  2                values(123'James',to_date('19781212','YYYYMMDD'), 23000,       32000,       'W')
  3  /

row created.

SQL> insert into Employee(empno,  ename,  hireDate,                       orig_salary, curr_salary, region)
  2                values(104,'Celia',to_date('19821024','YYYYMMDD'), 53000,       58000,        'E')
  3  /

row created.

SQL> insert into Employee(empno,  ename,  hireDate,                       orig_salary, curr_salary, region)
  2                values(105,'Robert',to_date('19840115','YYYYMMDD'), 31000,      36000,        'W')
  3  /

row created.

SQL> insert into Employee(empno,  ename,  hireDate,                       orig_salary, curr_salary, region)
  2                values(116,'Linda', to_date('19870730','YYYYMMDD'), 43000,       53000,       'E')
  3  /

row created.

SQL> insert into Employee(empno,  ename,  hireDate,                       orig_salary, curr_salary, region)
  2                values(117,'David', to_date('19901231','YYYYMMDD'), 78000,       85000,       'W')
  3  /

row created.

SQL> insert into Employee(empno,  ename,  hireDate,                       orig_salary, curr_salary, region)
  2                values(108,'Jode',  to_date('19960917','YYYYMMDD'), 21000,       29000,       'E')
  3  /

row created.

SQL>
SQL> -- prepare data for job table
SQL>
SQL> insert into job(empno, jobtitle)
  2           values(101,   'Painter');

row created.

SQL>
SQL> insert into job(empno, jobtitle)
  2           values(122,   'Tester');

row created.

SQL>
SQL> insert into job(empno, jobtitle)
  2           values(123,   'Dediator');

row created.

SQL>
SQL> insert into job(empno, jobtitle)
  2           values(104,   'Chemist');

row created.

SQL>
SQL> insert into job(empno, jobtitle)
  2           values(105,   'Accountant');

row created.

SQL>
SQL> insert into job(empno, jobtitle)
  2           values(116,   'Manager');

row created.

SQL>
SQL> insert into job(empno, jobtitle)
  2           values(117,   'Programmer');

row created.

SQL>
SQL> insert into job(empno, jobtitle)
  2           values(108,   'Developer');

row created.

SQL>
SQL>
SQL> -- display data in the table
SQL> select from Employee
  2  /
Hit a key to continue

     EMPNO ENAME      HIREDATE  ORIG_SALARY CURR_SALARY R
---------- ---------- --------- ----------- ----------- -
       122 Alison     21-MAR-96       45000       48000 E
       123 James      12-DEC-78       23000       32000 W
       104 Celia      24-OCT-82       53000       58000 E
       105 Robert     15-JAN-84       31000       36000 W
       116 Linda      30-JUL-87       43000       53000 E
       117 David      31-DEC-90       78000       85000 W
       108 Jode       17-SEP-96       21000       29000 E

rows selected.

SQL> select from job;
Hit a key to continue

     EMPNO JOBTITLE
---------- ----------
       101 Painter
       122 Tester
       123 Dediator
       104 Chemist
       105 Accountant
       116 Manager
       117 Programmer
       108 Developer

rows selected.

SQL>
SQL>
SQL>
SQL> -- the query shows that the join is performed with the other WHERE conditions:
SQL>
SQL> SELECT e.empno, e.ename, j.jobtitle, e.orig_salary
  2  FROM employee e, job j
  3  WHERE e.orig_salary < 43000
  4    AND e.empno = j.empno;
Hit a key to continue

     EMPNO ENAME      JOBTITLE   ORIG_SALARY
---------- ---------- ---------- -----------
       123 James      Dediator         23000
       105 Robert     Accountant       31000
       108 Jode       Developer        21000

SQL>
SQL>
SQL>
SQL> drop table job;

Table dropped.

SQL>
SQL> -- clean the table
SQL> drop table Employee;

Table dropped.

SQL>
SQL>
SQL>
           
         
    
    
  
Related examples in the same category
1.Adding an Analytical Function to a Query that Contains a Join (and Other WHERE Conditions)
2.Used a GROUP BY in a query with no ordering or analytical function
3.Adding Ordering to the Query Containing the GROUP BY
4.Supplying Table Aliases
5.Add the USING clause
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8.Get Categories and Products (with Alternate Join Syntax)
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10.Joining table to use between ... and clause
11.Nested Multi-Table Equi-Joins
12.How Many Featured Products By Department with JOINs
13.How Many Products By Department with JOINs
14.Non-Equi Joins
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