sqlalchemy connection and Add record to database table using insert query

We will use SQL INSERT to add a record to our database student table.
We defined my_conn as connection object.

In all the codes below replace userid, password and database_name with your MySQL login and database details.

from sqlalchemy import create_engine
my_conn = create_engine("mysql+mysqldb://userid:password@localhost/database_name")

We are using student table. Use the code to create your sample student table.

Add single record to student table.

from sqlalchemy import create_engine
my_conn = create_engine("mysql+mysqldb://userid:password@localhost/database_name")
id=my_conn.execute("INSERT INTO  `database_name`.`student` (`name` ,`class` ,`mark` ,`sex`) \
                  VALUES ('King1',  'Five',  '45',  'male')")
print("Row Added  = ",id.rowcount)

Output

Row Added  =  1

In our student table we have used one auto incremented id column. We will collect this id after adding record to database.

from sqlalchemy import create_engine
my_conn = create_engine("mysql+mysqldb://userid:password@localhost/database_name")
id=my_conn.execute("INSERT INTO  `database_name`.`student` (`name` ,`class` ,`mark` ,`sex`) \
                  VALUES ('King1',  'Five',  '45',  'male')")
print("ID of Row Added  = ",id.lastrowid)

Output

ID of Row Added  =  46

Using parameterized query to add record

Always use parameterized query when the data is coming from unknown sources. This is required to prevent injection attack.

from sqlalchemy import create_engine
my_conn = create_engine("mysql+mysqldb://userid:password@localhost/database_name")
query="INSERT INTO  `database_name`.`student` (`name` ,`class` ,`mark` ,`sex`) VALUES(%s,%s,%s,%s)"
my_data=('King','Five',45,'male')
id=my_conn.execute(query,my_data)
print("ID of Row Added  = ",id.lastrowid)

Output

ID of Row Added  =  45

Using multiple records to add

from sqlalchemy import create_engine
my_conn = create_engine("mysql+mysqldb://userid:password@localhost/database_name")
try:
    query="INSERT INTO  `database_name`.`student` (`name` ,`class` ,`mark` ,`sex`)  VALUES(%s,%s,%s,%s)"
    my_data=[('King','Five',45,'male'),
            ('Queen','Four',44,'Female'),
            ('Jack','Three',42,'male')]
    id=my_conn.execute(query,my_data)
    print("Rows Added  = ",id.rowcount)
except:
    print("Database error ")

Output

Rows Added  =  3

Capturing error message

If we want specific error message then can use like this.

from sqlalchemy import create_engine
from sqlalchemy.exc import SQLAlchemyError
my_conn = create_engine("mysql+mysqldb://userid:password@localhost/database_name")

try:
    query="INSERT INTO  `student9` (`name` ,`class` ,`mark` ,`sex`)  VALUES(%s,%s,%s,%s)"
    my_data=[('King','Five',45,'male'),
            ('Queen','Four',44,'Female'),
            ('Jack','Three',42,'male')]
    id=my_conn.execute(query,my_data)
    print("Rows Added  = ",id.rowcount)

except SQLAlchemyError as e:
        error = str(e.__dict__['orig'])
        print(error)

Listing all tables of the database

r_set=my_conn.execute("SHOW TABLES");
for row in r_set:
    print(row)

Listing all row of a table

r_set=my_conn.execute("SELECT * FROM student");
for row in r_set:
    print(row)

By using Tkinter we can create one GUI interface to store user entered inputs in MySQL table

Tkinter window to add user entered data to MySQL table More on Error handling

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Insert record in MySQL database table using sqlalchemy

Using parameterized query to add record

Using multiple records to add

Capturing error message

Listing all tables of the database

Listing all row of a table

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