Insert Operation

Adding a record to the table

The INSERT INTO statement is used to add a record to the table. In python, we can mention the format specifier (%s) in place of values.

We provide the actual values in the form of tuple in the execute() method of the cursor.

Consider the following example.

Example

import mysql.connector
#Create the connection object 
myconn = mysql.connector.connect(host = "localhost", user = "root",passwd = "google",database = "PythonDB")
#creating the cursor object
cur = myconn.cursor()
sql = "insert into Employee(name, id, salary, dept_id, branch_name) values (%s, %s, %s, %s, %s)"

#The row values are provided in the form of tuple 
val = ("John", 110, 25000.00, 201, "Newyork")

try:
    #inserting the values into the table
    cur.execute(sql,val)

    #commit the transaction 
    myconn.commit()
    
except:
    myconn.rollback()

print(cur.rowcount,"record inserted!")
myconn.close()

Output:

1 record inserted!

Insert multiple rows

We can also insert multiple rows at once using the python script. The multiple rows are mentioned as the list of various tuples.

Each element of the list is treated as one particular row, whereas each element of the tuple is treated as one particular column value (attribute).

Consider the following example.

Example

import mysql.connector
    
#Create the connection object 
myconn = mysql.connector.connect(host = "localhost", user = "root",passwd = "google",database = "PythonDB")

#creating the cursor object
cur = myconn.cursor()
sql = "insert into Employee(name, id, salary, dept_id, branch_name) values (%s, %s, %s, %s, %s)"
val = [("John", 102, 25000.00, 201, "Newyork"),("David",103,25000.00,202,"Port of spain"),("Nick",104,90000.00,201,"Newyork")]
    
try:
    #inserting the values into the table
    cur.executemany(sql,val)

    #commit the transaction 
    myconn.commit()
    print(cur.rowcount,"records inserted!")
    
except:
    myconn.rollback()

myconn.close()

Output:

3 records inserted!

Row ID

In SQL, a particular row is represented by an insertion id which is known as row id. We can get the last inserted row id by using the attribute lastrowid of the cursor object.

Consider the following example.

Example

import mysql.connector
#Create the connection object 
myconn = mysql.connector.connect(host = "localhost", user = "root",passwd = "google",database = "PythonDB")
#creating the cursor object
cur = myconn.cursor()
    
sql = "insert into Employee(name, id, salary, dept_id, branch_name) values (%s, %s, %s, %s, %s)"
    
val = ("Mike",105,28000,202,"Guyana")
    
try:
    #inserting the values into the table
    cur.execute(sql,val)

    #commit the transaction 
    myconn.commit()
    
    #getting rowid
    print(cur.rowcount,"record inserted! id:",cur.lastrowid)

except:
    myconn.rollback()

myconn.close()

Output: