Follow us: Subscribe via RSS Feed Connect on YouTube Connect on YouTube

Pages

Sunday, 3 April 2016

SQL Set Commands

These commands does not require statement terminator and applicable to the sessions, those will be automatically cleared when session was closed.

LINESIZE

This will be used to set the linesize. Default linesize is 80.

Syntax:
            Set linesize <value>

Ex:
            SQL> set linesize 100

PAGESIZE

This will be used to set the pagesize. Default pagesize is 14.

Syntax:
            Set pagesize <value>

Ex:
            SQL> set pagesize 30

DESCRIBE

This will be used to see the object’s structure.

Syntax:
            Describe or desc <object_name>

Ex:
            SQL> desc dept
          
Name                                                              Null?                    Type
----------------------------------------------------------------- ---------------------
DEPTNO                                                            NOT NULL  NUMBER(2)
DNAME                                                                                 VARCHAR2(14)
LOC                                                                                      VARCHAR2(13)

PAUSE

When the displayed data contains hundreds or thousands of lines, when you select it then it will automatically scrolls and displays the last page data. To prevent this you can use this pause option. By using this it will display the data correspoinding to the pagesize with a break which will continue by hitting the return key. By default this will be off.

Syntax:
            Set pause on | off

Ex:
            SQL> set pause on

FEEDBACK

This will give the information regarding howmany rows you selected the object. By default the feedback message will be displayed, only when the object contains more than 5 rows.

Syntax:
            Set feedback <value>

Ex:
SQL> set feedback 4
SQL> select * from dept;

 DEPTNO    DNAME         LOC
---------- -------------- -------------
        10   ACCOUNTING   NEW YORK
        20   RESEARCH        DALLAS
        30   SALES               CHICAGO
        40   OPERATIONS    BOSTON

4 rows selected.

HEADING

If you want to display data without headings, then you can achieve with this. By default heading is on.

Syntax:
            Set heading on | off

Ex:
SQL> set heading off
SQL> select * from dept;

        10   ACCOUNTING   NEW YORK
        20   RESEARCH        DALLAS
        30   SALES               CHICAGO
        40   OPERATIONS    BOSTON

SERVEROUTPUT

This will be used to display the output of the PL/SQL programs. By default this will be off.

Syntax:
            Set serveroutput on | off

Ex:
            SQL> set serveroutput on

TIME

This will be used to display the time. By default this will be off.
Syntax:
            Set time on | off

Ex:
            SQL> set time on
19:56:33 SQL>

TIMING

This will give the time taken to execute the current SQL statement. By default this will be off.

Syntax:
            Set timing on | off

Ex:
SQL> set timing on
SQL> select * from dept;

 DEPTNO    DNAME         LOC
---------- -------------- -------------
        10   ACCOUNTING   NEW YORK
        20   RESEARCH        DALLAS
        30   SALES               CHICAGO
        40   OPERATIONS    BOSTON

Elapsed: 00:00:00.06

SQLPROMPT

This will be used to change the SQL prompt.

Syntax:
            Set sqlprompt <prompt>


Ex:
SQL> set sqlprompt 'ORACLE>'
ORACLE>

SQLCASE

This will be used to change the case of the SQL statements. By default the case is mixed.

Syntax:
            Set sqlcase upper | mixed | lower

Ex:
SQL> set sqlcase upper

SQLTERMINATOR

This will be used to change the terminator of the SQL statements. By default the terminator is ;.

Syntax:
            Set sqlterminator <termination_character>

Ex:
SQL> set sqlterminator :
SQL> select * from dept:

DEFINE

By default, if the & character finds then it will treat as bind variable and ask for the input. Suppose your want to treat it as a normal character while inserting data, then you can prevent this by using the define option. By default, this will be on

Syntax:
            Set define on | off

Ex:
            SQL>insert into dept values(50,'R&D','HYD');
Enter value for d:
old   1: insert into dept values(50,'R&D','HYD')
new   1: INSERT INTO DEPT VALUES(50,'R','HYD')

            SQL> set define off
            SQL>insert into dept values(50,'R&D','HYD');    -- here it won’t ask for value

NEWPAGE

This will shows how many blank lines will be left before the report. By default it will leave one blank line.

Syntax:
            Set newpage <value>

Ex:
            SQL> set newpage 10

The zero value for newpage does not produce zero blank lines instead it switches to a special property which produces a top-of-form character (hex 13) just before the date on each page. Most modern printers respond to this by moving immediately to the top of the next page, where the priting of the report will begin.

HEADSEP

This allow you to indicate where you want to break a page title or a column heading that runs longer than one line. The default heading separator is vertical bar (|).

Syntax:
            Set headsep <separation_char>

Ex:
SQL> select * from dept;


 DEPTNO    DNAME         LOC
---------- -------------- -------------
        10   ACCOUNTING   NEW YORK
        20   RESEARCH        DALLAS
        30   SALES               CHICAGO
        40   OPERATIONS    BOSTON

SQL> set headsetp !
SQL> col dname heading 'DEPARTMENT ! NAME'
SQL> /

                 DEPARTMENT
 DEPTNO       NAME             LOC
---------- -----------------   ----------
        10   ACCOUNTING    NEW YORK
        20  RESEARCH          DALLAS
        30  SALES                 CHICAGO
        40  OPERATIONS     BOSTON
          
ECHO

When using a bind variable, the SQL statement is maintained by echo. By default this is off.

Syntax:
            Set echo on | off

VERIFY

When using a bind variable, the old and new statements will be maintained by verify. By default this is on.

Syntax:
            Set verify on | off


Ex:
            SQL> select * from dept where deptno = &dno;
Enter value for dno: 10
old   1: select * from dept where deptno = &dno
new   1: select * from dept where deptno = 10

    DEPTNO    DNAME           LOC
    ---------- ---------------- -----------
        10       ACCOUNTING  NEW YORK

SQL> set verify off
SQL> select * from dept where deptno = &dno;
Enter value for dno: 20

    DEPTNO  DNAME         LOC
    ---------- -------------  -----------
        20       RESEARCH   DALLAS

PNO

This will give displays the page numbers. By default the value would be zero.

Ex:
SQL> col hiredate new_value xtoday noprint format a1 trunc
SQL> ttitle left xtoday right 'page' sql.pno             
SQL> select * from emp where deptno = 10;

09-JUN-81                                                                                    page         1

 EMPNO   ENAME      JOB             MGR       SAL  COMM     DEPTNO
---------- ---------- --------------- --------- ----- ---------- ----------
      7782  CLARK     MANAGER     7839    2450                    10
      7839  KING       PRESIDENT               5000                    10
      7934  MILLER   CLERK           7782    1300                    10



In the above noprint tells SQLPLUS not to display this column when it prints the results of the SQL statement. Dates that have been reformatted by TO_CHAR get a default width of about 100 characters. By changing the format to a1 trunc, you minimize this effect. NEW_VALUE inserts contents of the column retrieved by the SQL statement into a variable called xtoday.
Share this article :

0 comments:

Post a Comment