DBMS_SQL package: dynamic SQL : dbms_sql « System Packages « Oracle PL / SQL

DBMS_SQL package: dynamic SQL

  
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>
SQL> CREATE OR REPLACE PROCEDURE updateSession(
  2    p_Department  IN session.department%TYPE,
  3    p_NewCredits  IN session.num_credits%TYPE,
  4    p_RowsUpdated OUT INTEGER) AS
  5
  6    v_CursorID   INTEGER;
  7    v_UpdateStmt VARCHAR2(100);
  8  BEGIN
  9    v_CursorID := DBMS_SQL.OPEN_CURSOR;
 10
 11    v_UpdateStmt :=
 12      'UPDATE session
 13         SET num_credits = :nc
 14         WHERE department = :dept';
 15
 16    DBMS_SQL.PARSE(v_CursorID, v_UpdateStmt, DBMS_SQL.NATIVE);
 17
 18    DBMS_SQL.BIND_VARIABLE(v_CursorID, ':nc', p_NewCredits);
 19
 20    DBMS_SQL.BIND_VARIABLE_CHAR(v_CursorID, ':dept', p_Department);
 21
 22    p_RowsUpdated := DBMS_SQL.EXECUTE(v_CursorID);
 23
 24    DBMS_SQL.CLOSE_CURSOR(v_CursorID);
 25  EXCEPTION
 26    WHEN OTHERS THEN
 27      DBMS_SQL.CLOSE_CURSOR(v_CursorID);
 28      RAISE;
 29  END updateSession;
 30  /

Procedure created.

SQL>
SQL> drop table session;

Table dropped.

SQL>

Related examples in the same category

1.	First DBMS_SQL Example
2.	Pass a query statement to a stored procedure
3.	Use dbms_sql.open_cursor create a cursor
4.	Use dbms_sql.bind_variable, dbms_sql.execute to insert value to a table
5.	Use dbms_sql.bind_array to bind array to a cursor
6.	Use dbms_sql.parse to bind a select statement to a cursor
7.	Call dbms_sql.describe_columns2 to get info for a column
8.	Non-Query DML and DDL Statements
9.	Use DBMS_SQL with the RETURNING clause.
10.	DBMS_SQL.NATIVE;
11.	DBMS_SQL.PARSE and DBMS_SQL.EXECUTE
12.	Dynamic sql statement with variable binding
13.	Dynamic select statement and row fetch
14.	Execute PL/SQL block
15.	Pass where clause to a stored procedure
16.	Executing Queries and use DBMS_SQL.COLUMN_VALUE to map value
17.	Executing PL/SQL Blocks and use BIND_VARIABLE to bind variable
18.	drop the supplied table using dynamic SQL.
19.	DBMS_SQL.BIND_VARIABLE_CHAR
20.	illustrate the importance of setting out_value_size.
21.	Calling a function which uses dynamic SQL from within an SQL statement.
22.	Illustrates the interaction of roles and dynamic SQL.
23.	illustrates a DDL statement which is built dynamically from the procedure parameters.
24.	Use dbms_sql to process query, cursor and value
25.	Use dbms_sql.bind_variable to bind variable
26.	dbms_sql.varchar2_table type variable