Function with insert statement can be called from a DML statement. : Function Call « Stored Procedure Function « Oracle PL / SQL

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Oracle PL / SQL » Stored Procedure Function » Function Call 
Function with insert statement can be called from a DML statement.
 
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>
SQL> CREATE TABLE MyTable (
  2    num_col    NUMBER,
  3    char_col   VARCHAR2(60)
  4    );

Table created.

SQL>
SQL> CREATE OR REPLACE FUNCTION UpdateTemp(p_ID IN lecturer.ID%TYPE)
  2    RETURN lecturer.ID%TYPE AS
  3  BEGIN
  4    INSERT INTO MyTable (num_col, char_col)
  5      VALUES(p_ID, 'Updated!');
  6    RETURN p_ID;
  7  END UpdateTemp;
  8  /

Function created.

SQL>
SQL> UPDATE lecturer
  2    SET major = 'Nutrition'
  3    WHERE UpdateTemp(ID= ID;

12 rows updated.

SQL>
SQL> drop table MyTable;

Table dropped.

SQL>
SQL> drop table lecturer;

Table dropped.

SQL>

 
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3.Use a user-defined function in stored procedure
4.Local Subprograms
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6.This function cannot be called from a SQL statement: cannot perform a DML operation inside a query
7.This function can be called from a SQL statement.
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