Many people were aware of java rather than python. Why? The reason is the lack of awareness of that programming language and people were ready to write lines and lines of code to execute a simple program. There were some situations like while developing a new project, there is need to change the variable type at a particular instance where the developer needs to change the variable type declaration in the source code.
If the end user needs to change to the other type, the user must approach the developer for the change of variable type. Does java fail in the situation, where the data type of the end user input variable is unknown? This problem overcame by the python. And many people don’t know that python is an older language than java. Today in this article we were going to discuss How does python interact with databases?
Before going how do those interact, let's have an overview of what is python?
Python is an object-oriented, high-level and interactive programming language which was made by Guido van Rossum in the year 1985 – 1990. The source code of python is accessible under GNU Global Public License (GPL). Today we're hearing that programming language is object-oriented and supports OOPS feature. what are those OOPS standards?
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OOP’s stands for object-oriented programming structure where it follows certain standards(features) which were common and where ever these concept is applicable in a programming language. The programming language said to support oops concept whenever it supports the following features.
Inheritance: Acquiring the properties of a super class by a subclass is called Inheritance
Encapsulation: Especially Wrapping up of code and data in a single class called Encapsulation
Abstraction: Hiding of the original data.Polymorphism: Existing in many forms. i.e a super class may divided into multiple sub classes.
Today we were getting the information from various sources. This information must stored in an easy secure way so as to retrieve the data whenever required. Today we have many databases for storing and retrieving of data. Among them, MYSQL provided by ORACLE has its own importance. It has used by many companies for storing and retrieval of data. Now let us have a look at How does Python interact with databases like MySQL.
Generally MySQL DB is an interface for connecting MySQL database server from python. Before connecting programming language to the MYSQL DB make sure that MySQL Db installed on your system. If the connection established with your database source, the connection object returned and saved in DB for future use, otherwise. The DB set to none. Next, DB object used to create cursor which in turn used to run SQL queries. Finally, it ensures that database connection closed and the resources released.
After creation the connection with the database, the next step is to create the table in the database and then inserting the data in the database, where INSERT (); used for inserting the data in the database. After Insertion of data, there is a need for retrieval of data where do the Read (); used for the retrieval of data. In Addition Fetching of data from the database divided into three categories :
Fetch One(): It used for fetching the single row (next row ) of data from the query result set. A result set an object that returned when a cursor object used to query table.
Fetch all (): This function is used to fetch all the records of the table in the result set. If some results have already retrieved then the remaining results will fetched.
Row Count (): It used to count the number of rows from the result set.
Along with the above operations, it also performs the updating of records and deletion of duplicate (or) unnecessary records from the database. Using this database means for storing the data, python serves basis for coding many programmers today.
Recommended Audience :
Software Developers
Team Leaders
Project Managers
Database developers
Prerequisites:
There nothing additional prerequisites required in order to purse to Python course. It's better to have a basic knowledge of programming languages like C (or ) Java. But not mandatory. Trainers of OnlineITGuru will teach you from the basics if you don't have that knowledge.
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