# Simulated database records
database_records = [
    {'id': 1, 'name': 'Alice', 'age': 25},
    {'id': 2, 'name': 'Bob', 'age': 30},
    {'id': 3, 'name': 'Charlie', 'age': 35},
    {'id': 4, 'name': 'David', 'age': 40},
    {'id': 5, 'name': 'Eve', 'age': 45}
]

# Implicit cursor implementation using loop
def implicit_cursor():
    for record in database_records:
        yield record

# Main function to demonstrate implicit cursor
def main():
    cursor = implicit_cursor()
    
    # Fetching records one by one
    print("Fetching records using implicit cursor:")
    for i in range(len(database_records)):
        record = next(cursor)
        print(f"Record {i + 1}: {record}")

if __name__ == "__main__":
    main()
by

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About PL/SQL

PL/SQL is procedural extension for SQL created by Oracle. It is by default embedded into the Oracle Database. PL/SQL program units are compiled and stored inside the Oracle Database which results in optimal execution times as the PL/SQL and SQL run within the same server process.

Syntax help

Following is the syntax structure for the PL/SQL code blocks

DECLARE 
   <declarations section> 
BEGIN 
   <executable command(s)>
EXCEPTION 
   <exception handling> 
END;

Example

DECLARE 
   message  varchar2(100):= 'Hello, World!'; 
BEGIN 
   dbms_output.put_line(message); 
END; 
/

Named procedures

CREATE OR REPLACE FUNCTION 
hello_user
   (user_name IN VARCHAR2) 
    RETURN VARCHAR2
IS
BEGIN
   RETURN 'Hello ' || user_name;
END hello_user;
/

BEGIN
   dbms_output.put_line(hello_user('Peter'));
END;
/

Exception handling

BEGIN
  DBMS_OUTPUT.put_line (1/0);
EXCEPTION
  WHEN OTHERS
  THEN
    DBMS_OUTPUT.put_line ('error is: ' || SQLERRM);
END;