Use USING clause with EXECUTE IMMEDIATE to handle bind variables. : Execute Immediate « PL SQL « Oracle PL / SQL

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Oracle PL / SQL » PL SQL » Execute Immediate 
Use USING clause with EXECUTE IMMEDIATE to handle bind variables.
  
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', 3011420000);

row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('HIS', 301'History 301', 300420004);

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', 500420001);

row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('ECN', 203'Economics 203', 150320002);

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', 353420003);

row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('MUS', 410'Music 410', 54320005);

row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('ECN', 101'Economics 101', 500420007);

row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('NUT', 307'Nutrition 307', 202420008);

row created.

SQL>
SQL> INSERT INTO session(department, course, description, max_lecturer, current_lecturer, num_credits, room_id)
  2              VALUES ('MUS', 100'Music 100', 10003, NULL);

row created.

SQL>
SQL> CREATE TABLE lecturer (
  2    id               NUMBER(5PRIMARY 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);

row created.

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

row created.

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

row created.

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

row created.

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

row created.

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

row created.

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

row created.

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

row created.

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

row created.

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

row created.

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

row created.

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

row created.

SQL>
SQL> CREATE TABLE myStudent (
  2    student_id NUMBER(5NOT NULL,
  3    department CHAR(3)   NOT NULL,
  4    course     NUMBER(3NOT NULL,
  5    grade      CHAR(1)
  6    );

Table created.

SQL>
SQL>
SQL>
SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10000'CS', 102'A');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10002'CS', 102'B');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10003'CS', 102'C');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10000'HIS', 101'A');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10001'HIS', 101'B');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10002'HIS', 101'B');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10003'HIS', 101'A');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10004'HIS', 101'C');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10005'HIS', 101'C');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10006'HIS', 101'E');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10007'HIS', 101'B');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10008'HIS', 101'A');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10009'HIS', 101'D');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10010'HIS', 101'A');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10008'NUT', 307'A');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10010'NUT', 307'A');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10009'MUS', 410'B');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10006'MUS', 410'E');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10011'MUS', 410'B');

row created.

SQL>
SQL> INSERT INTO myStudent (student_id, department, course, grade)
  2                           VALUES (10000'MUS', 410'B');

row created.

SQL>
SQL>
SQL> DECLARE
  2    sqlString  VARCHAR2(1000);
  3    codeBlock VARCHAR2(1000);
  4
  5    CURSOR c_EconMajor IS
  6      SELECT *
  7        FROM lecturer
  8        WHERE major = 'Economics';
  9  BEGIN
 10    sqlString :=
 11      'INSERT INTO session (department, course, description,
 12                            max_lecturer, current_lecturer,
 13                            num_credits)
 14         VALUES (:dep, :course, :descr, :max_s, :cur_s, :num_c)';
 15
 16    EXECUTE IMMEDIATE sqlString USING
 17      'ECN', 103'Economics 103', 1003;
 18
 19    FOR myLecturerRec IN c_EconMajor LOOP
 20      EXECUTE IMMEDIATE
 21          'INSERT INTO myStudent
 22             (student_ID, department, course, grade)
 23           VALUES (:id, :dep, :course, NULL)'
 24        USING myLecturerRec.ID, 'ECN', 103;
 25
 26      codeBlock :=
 27        'BEGIN
 28           UPDATE session SET current_lecturer = current_lecturer + 1
 29           WHERE department = :d and course = :c;
 30         END;';
 31
 32      EXECUTE IMMEDIATE codeBlock USING 'ECN', 103;
 33    END LOOP;
 34  END;
 35  /

PL/SQL procedure successfully completed.

SQL>
SQL> drop table session;

Table dropped.

SQL>
SQL> drop table lecturer;

Table dropped.

SQL>
SQL> drop table myStudent;

Table dropped.

   
  
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