Python Programming Training Certification
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Course Overview
Python is one of the world’s top programming languages used today and Python training has become the most popular training across individuals. Training Basket’s Python Training & Certification course covers basic and advanced Python concepts and how to apply them in real-world applications.Python is a flexible and powerful open-source language that is easy to learn and consists of powerful libraries for data analysis and manipulation. Our Python training course content is curated by experts as per the standard Industry curriculum. The curriculum, coding challenges and real-life problems cover data operations in Python, strings, conditional statements, error handling, shell scripting, web scraping and the commonly used Python web framework Django. Take this Python training and certification course and become job-ready now.
Creating tables
In this section of the tutorial, we will create the new table Employee. We have to mention the database name while establishing the connection object.
We can create the new table by using the CREATE TABLE statement of SQL. In our database PythonDB, the table Employee will have the four columns, i.e., name, id, salary, and department_id initially.
The following query is used to create the new table Employee.
- > create table Employee (name varchar(20) not null, id int primary key, salary float not null, Dept_Id int not null)
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()
Now, we may check that the table Employee is present in the database.
Alter Table
Sometimes, we may forget to create some columns, or we may need to update the table schema. The alter statement used to alter the table schema if required. Here, we will add the column branch_name to the table Employee. The following SQL query is used for this purpose.
- alter table Employee add branch_name varchar(20) not null
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()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()
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