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Python MySql CRUD

Creating the table

import mysql.connector

mydb = mysql.connector.connect(
host="localhost",
user="yourusername",
password="yourpassword",
database="mydatabase"
)

mycursor = mydb.cursor()

mycursor.execute("CREATE TABLE employee (name VARCHAR(255), address VARCHAR(255))")

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()

try:
#Creating a table with name Employee having four columns i.e., name, id, salary, and department id
dbs = cur.execute("create table Employee(name varchar(20) not null, id int(20) not null primary key, salary float not null, Dept_id int not null)")
except:
myconn.rollback()

myconn.close()

ALTER TABLE

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()

try:
#adding a column branch name to the table Employee
cur.execute("alter table Employee add branch_name varchar(20) not null")
except:
myconn.rollback()

myconn.close()

Insert Into Table

import mysql.connector

mydb = mysql.connector.connect(
host="localhost",
user="yourusername",
password="yourpassword",
database="mydatabase"
)

mycursor = mydb.cursor()

sql = "INSERT INTO customers (name, address) VALUES (%s, %s)"
val = ("John", "Highway 21")
mycursor.execute(sql, val)

mydb.commit()

print(mycursor.rowcount, "record inserted.")

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()





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