Rank(): If the statement requests another ordering, another sort may result : Rank « Analytical Functions « Oracle PL / SQL

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Oracle PL / SQL » Analytical Functions » Rank 
Rank(): If the statement requests another ordering, another sort may result
 


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(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> -- If the statement requests another ordering, another sort may result
SQL>
SQL> SELECT empno, ename, curr_salary,
  2    RANK() OVER(ORDER BY curr_salary)
  3  FROM employee
  4  WHERE curr_salary > 3800
  5  ORDER BY ename;
Hit a key to continue

     EMPNO ENAME      CURR_SALARY RANK()OVER(ORDERBYCURR_SALARY)
---------- ---------- ----------- ------------------------------
       122 Alison           48000                              4
       104 Celia            58000                              6
       117 David            85000                              7
       123 James            32000                              2
       108 Jode             29000                              1
       116 Linda            53000                              5
       105 Robert           36000                              3

rows selected.

SQL> drop table job;

Table dropped.

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

Table dropped.

SQL>
SQL>
           
         
  
Related examples in the same category
1. RANK(): rank items, leaves a gap in the sequence when there is a tie
2. The ranking as opposed to a row-numbering problem (the problem of ties)
3. The WHERE is applied before the RANK()
4. Rank with order by clause
5. When RANK() is added to the statement, the RANK function is applied last, just before the ordering
6. RANK() with NULLS LAST demo
7. RANK() with NULLS FIRST
8. Rank() with null values
9. Rank() over partition
10. Browse Products with ranking function
11. rank() over (partition by deptno order by sal desc )
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