Count the number of rows contained in a database - Python and SQLite

There will be several instances in which you will need to know the number of rows (or records) contained in your database. This function shows you how to achieve that.

Code

import sqlite3

#This simply counts and returns the number of rows in the database
def count_rows():
    conn=sqlite3.connect("test.db")
    myrows=conn.execute("SELECT count(*) from STUDENT;")
    for row in myrows:
        print(row)


def return_specific_fields():
    conn=sqlite3.connect("test.db")
    myrows=conn.execute("SELECT ID, NAME from STUDENT;")
    for row in myrows:
        print(row)
        

def sorting():
    conn=sqlite3.connect('test.db')
    #change the ASC at the end to DESC and ...yes, it will sort by descending order instead!
    myrows=conn.execute("SELECT * from STUDENT ORDER BY POINTS ASC;")
    print("Sorting from the least points to the most")
    print("===========================")
    for row in myrows:
        print(row)
        
def search_for_phrase():
    conn=sqlite3.connect('test.db')
    myrows=conn.execute("SELECT * from STUDENT WHERE POINTS GLOB '*00*'")
    for row in myrows:
        print(row)

def the_where_clause():
    conn=sqlite3.connect('test.db')
    myrows=conn.execute("SELECT * from STUDENT WHERE POINTS >= 19000;")
    print("The students who have achieved points above 19000 are:")
    print("=======================================")
    for row in myrows:
        print(row)
    conn.close()

def deleting():
    conn=sqlite3.connect('test.db')
    conn.execute("DELETE from STUDENT where ID = 3;")
    conn.commit()
    print("Total number of rows deleted :", conn.total_changes)

    cursor = conn.execute("SELECT id, name, comment, points from STUDENT")
    for row in cursor:
     print("ID = ", row[0])
     print("NAME = ", row[1])
     print("COMMENTS = ", row[2])
     print("POINTS = ", row[3], "\n")
     print("====Your request to delete has been completed=====")
    conn.close()

def update_database():
    conn = sqlite3.connect('test.db')
    conn.execute("UPDATE STUDENT set POINTS = 99000.00 where ID = 4")
    conn.commit
    print("Total number of rows updated :", conn.total_changes)

    cursor = conn.execute("SELECT id, name, comment, points from STUDENT")
    for row in cursor:
       print ("ID = ", row[0])
       print ("NAME = ", row[1])
       print ("COMMENT = ", row[2])
       print ("POINTS = ", row[3], "\n")

    print("===Request complete===")
    conn.close()

def create_table():
    conn = sqlite3.connect('test.db')
    print("Opened database")
    conn.execute('''CREATE TABLE STUDENT
         (ID INT PRIMARY KEY     NOT NULL,
         NAME           TEXT    NOT NULL,
         AGE            INT     NOT NULL,
         COMMENT        CHAR(50),
         POINTS         REAL);''')
    print("A database table has been created now")
    conn.close()

def add_records():
    conn=sqlite3.connect('test.db')
    
    conn.execute("INSERT INTO STUDENT (ID,NAME,AGE,COMMENT,POINTS) \
          VALUES (1, 'Jonathan', 14, 'One of our top students!', 20000.00 )");

    conn.execute("INSERT INTO STUDENT (ID,NAME,AGE,COMMENT,POINTS) \
          VALUES (2, 'Ruth', 15, 'An all rounder - wonderful!', 15000.00 )");

    conn.execute("INSERT INTO STUDENT (ID,NAME,AGE,COMMENT,POINTS) \
          VALUES (3, 'Nick', 14, 'Lacks drive and motivation. Rude.', 2.00 )");

    conn.execute("INSERT INTO STUDENT (ID,NAME,AGE,COMMENT,POINTS) \
          VALUES (4, 'Pigachee', 15, 'No.1 at everything.Simply Amazing!', 65000.00 )");

    conn.commit()
    print("Records have been created")
    conn.close()

def fetch_display():
    conn = sqlite3.connect('test.db')
    cursor = conn.execute("SELECT id, name, comment, points from STUDENT")
    for row in cursor:
       print ("ID=" ,row[0])
       print ("NAME = ", row[1])
       print ("COMMENT = ", row[2])
       print ("POINTS = ", row[3], "\n")

    print ("Operation has been completed as per your request")
    conn.close()

count_rows()