uses dynamic SQL to issue an ALTER SESSION statement. : Session variable « SQL Plus « Oracle PL / SQL






  1. Oracle PL / SQL
  2. SQL Plus
  3. Session variable

uses dynamic SQL to issue an ALTER SESSION statement.

    
SQL>
SQL> CREATE TABLE session (
  2    department       CHAR(3),
  3    course           NUMBER(3),
  4    description      VARCHAR2(2000),
  5    max_lecturer     NUMBER(3),
  6    current_lecturer NUMBER(3),
  7    num_credits      NUMBER(1),
  8    room_id          NUMBER(5)
  9    );

Table created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('HIS', 101, 'History 101', 30, 11, 4, 20000);

1 row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('HIS', 301, 'History 301', 30, 0, 4, 20004);

1 row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('CS', 101, 'Computer Science 101', 50, 0, 4, 20001);

1 row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('ECN', 203, 'Economics 203', 15, 0, 3, 20002);

1 row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('CS', 102, 'Computer Science 102', 35, 3, 4, 20003);

1 row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('MUS', 410, 'Music 410', 5, 4, 3, 20005);

1 row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('ECN', 101, 'Economics 101', 50, 0, 4, 20007);

1 row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('NUT', 307, 'Nutrition 307', 20, 2, 4, 20008);

1 row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('MUS', 100, 'Music 100', 100, 0, 3, NULL);

1 row created.

SQL>
SQL>
SQL> CREATE TABLE place (
  2    room_id          NUMBER(5) PRIMARY KEY,
  3    building         VARCHAR2(15),
  4    room_number      NUMBER(4),
  5    number_seats     NUMBER(4),
  6    description      VARCHAR2(50)
  7    );

Table created.

SQL>
SQL> INSERT INTO place (room_id, building, room_number, number_seats, description)
  2             VALUES (20001, 'Building 7', 201, 1000, 'Large Lecture Hall');

1 row created.

SQL>
SQL> INSERT INTO place (room_id, building, room_number, number_seats, description)
  2             VALUES (20002, 'Building 6', 101, 500, 'Small Lecture Hall');

1 row created.

SQL>
SQL> INSERT INTO place (room_id, building, room_number, number_seats, description)
  2             VALUES (20003, 'Building 6', 150, 50, 'Discussion Room A');

1 row created.

SQL>
SQL> INSERT INTO place (room_id, building, room_number, number_seats, description)
  2             VALUES (20004, 'Building 6', 160, 50, 'Discussion Room B');

1 row created.

SQL>
SQL> INSERT INTO place (room_id, building, room_number, number_seats,description)
  2             VALUES (20005, 'Building 6', 170, 50, 'Discussion Room C');

1 row created.

SQL>
SQL> INSERT INTO place (room_id, building, room_number, number_seats, description)
  2             VALUES (20006, 'Music Building', 100, 10, 'Music Practice Room');

1 row created.

SQL>
SQL> INSERT INTO place (room_id, building, room_number, number_seats, description)
  2             VALUES (20007, 'Music Building', 200, 1000, 'Concert Room');

1 row created.

SQL>
SQL> INSERT INTO place (room_id, building, room_number, number_seats, description)
  2             VALUES (20008, 'Building 7', 300, 75, 'Discussion Room D');

1 row created.

SQL>
SQL> INSERT INTO place (room_id, building, room_number, number_seats,description)
  2             VALUES (20009, 'Building 7', 310, 50, 'Discussion Room E');

1 row created.

SQL>
SQL> CREATE TABLE lecturer (
  2    id               NUMBER(5) PRIMARY KEY,
  3    first_name       VARCHAR2(20),
  4    last_name        VARCHAR2(20),
  5    major            VARCHAR2(30),
  6    current_credits  NUMBER(3)
  7    );

Table created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10001, 'Scott', 'Lawson','Computer Science', 11);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major, current_credits)
  2                VALUES (10002, 'Mar', 'Wells','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10003, 'Jone', 'Bliss','Computer Science', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10004, 'Man', 'Kyte','Economics', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10005, 'Pat', 'Poll','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10006, 'Tim', 'Viper','History', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10007, 'Barbara', 'Blues','Economics', 7);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10008, 'David', 'Large','Music', 4);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10009, 'Chris', 'Elegant','Nutrition', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10010, 'Rose', 'Bond','Music', 7);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10011, 'Rita', 'Johnson','Nutrition', 8);

1 row created.

SQL>
SQL> INSERT INTO lecturer (id, first_name, last_name, major,current_credits)
  2                VALUES (10012, 'Sharon', 'Clear','Computer Science', 3);

1 row created.

SQL>
SQL>
SQL> DECLARE
  2    v_RoomRec place%ROWTYPE;
  3    myLecturerRec lecturer%ROWTYPE;
  4    v_sessionRec session%ROWTYPE;
  5  BEGIN
  6    SELECT *
  7      INTO v_RoomRec
  8      FROM place
  9      WHERE room_ID = 20001;
 10
 11    EXECUTE IMMEDIATE 'ALTER SESSION SET SQL_TRACE = TRUE';
 12
 13    SELECT *
 14      INTO myLecturerRec
 15      FROM lecturer
 16      WHERE ID = 10007;
 17
 18    EXECUTE IMMEDIATE 'ALTER SESSION SET SQL_TRACE = FALSE';
 19
 20    SELECT *
 21      INTO v_sessionRec
 22      FROM session
 23      WHERE department = 'NUT' and course = 307;
 24  END;
 25  /

PL/SQL procedure successfully completed.

SQL>
SQL> drop table session;

Table dropped.

SQL>
SQL> drop table place;

Table dropped.

SQL> drop table lecturer;

Table dropped.

SQL>








Related examples in the same category

1.alter the session with the ALTER SESSION statement and set the session's time zone forward
2.alter session set nls_date_format = 'dd-MON-yyyy hh24:mi:ss';
3.alter session set OPTIMIZER_MODE = RULE
4.Adjust your session time zone to -08:00, display the contents of your time table.
5.alter session set cursor_sharing = force
6.alter session set use_stored_outlines
7.Event-based call and exception tracing
8.event-based call and exception tracing.
9.SQL trace
10.ALTER SESSION SET QUERY_REWRITE_ENABLED
11.alter session set sql_trace=true
12.sql_trace a stored procedure
13.Set the following session parameters to enable query rewrite:
14.If your session time zone is not US/Central (-06:00), alter your session to Central time:
15.alter session set nls_date_format = 'DD-MON-YYYY HH24:MI:SS'
16.Alter time_zone
17.sessiontimezone, current_timestamp
18.demonstrates the use of DBMS_SQL to execute an ALTER SESSION statement.
19.interaction between ALTER SESSION and autonomous transactions.
20.ALTER SESSION SET SQL_TRACE = TRUE
21.ALTER SESSION SET optimizer_dynamic_sampling
22.alter session set NLS_DATE_FORMAT='DD-MM-YYYY'
23.alter session set current_schema=Smart
24.alter session set db_file_multiblock_read_count
25.alter session set hash_area_size
26.alter session set nls_date_format='dd-mm-yyyy', nls_language=Dutch, nls_currency='Eur'
27.alter session set optimizer_index_cost_adj, alter session set optimizer_index_caching
28.alter session set optimizer_max_permutations=80000
29.alter session set optimizer_mode=all_rows
30.alter session set optimizer_mode=first_rows
31.alter session set query_rewrite_integrity=enforced
32.alter session set sort_area_size = 102400000
33.alter session set workarea_size_policy=manual
34.alter system flush shared_pool
35.alter system quiesce restricted
36.alter system resume
37.alter system suspend
38.set optimizer_features_enable = '8.1.5' scope = spfile
39.show filestat
40.show parameter optimizer_features
41.show verify
42.If your session time zone is not US/Central Standard Time (-06:00), alter your session to Central Standard time: