WHILE..LOOP, Cursor Loop : While Loop « PL SQL « Oracle PL / SQL

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Oracle PL / SQL » PL SQL » While Loop 
WHILE..LOOP, Cursor Loop
    

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> CREATE TABLE MyTable (
  2    num_col    NUMBER,
  3    char_col   VARCHAR2(60)
  4    );

Table created.

SQL>
SQL>
SQL> DECLARE
  2    CURSOR myHistoryLecturer IS
  3      SELECT id, first_name, last_name
  4        FROM lecturer
  5        WHERE major = 'History';
  6
  7    myLecturerData  myHistoryLecturer%ROWTYPE;
  8  BEGIN
  9    OPEN myHistoryLecturer;
 10    FETCH myHistoryLecturer INTO myLecturerData;
 11
 12    WHILE myHistoryLecturer%FOUND LOOP
 13      INSERT INTO myStudent (student_id, department, course)
 14        VALUES (myLecturerData.ID, 'HIS', 101);
 15
 16      INSERT INTO MyTable (num_col, char_col)
 17        VALUES (myLecturerData.ID,
 18                myLecturerData.first_name || ' ' || myLecturerData.last_name);
 19
 20      FETCH myHistoryLecturer INTO myLecturerData;
 21    END LOOP;
 22
 23    CLOSE myHistoryLecturer;
 24
 25    COMMIT;
 26  END;
 27  /

PL/SQL procedure successfully completed.

SQL>
SQL> select from MyTable;

   NUM_COL CHAR_COL
---------- ------------------------------------------------------------
     10002 Mar Wells
     10005 Pat Poll
     10006 Tim Viper

SQL>
SQL> drop table myStudent;

Table dropped.

SQL> drop table lecturer;

Table dropped.

SQL> drop table MyTable;

Table dropped.

SQL>
SQL>

--

   
    
    
  
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