Programmers might expect that Python may make database programming more straightforward and painless job, the Python database API supply with database-neutral programming interface for different databases.
- MS SQL
- Oracle etc….
The DB-API is the standard for Python's database interface.
What is Database?
The database is a collection of organized information that can easily be used, managed, update, and they are classified according to their organizational approach.
The Python Database interfaces are categorized into two. These are:
Generic Database Interface
Most Python's database interface remains to Python's DB-API standard and most of the databases have ODBC support. Other than that Java database usually support JDBC and programmers can work with that from Jython.
Relational Database System Interface
This employs a relational model with support of SQL. Lists of general-purpose database systems are:
- SAP DB
- MS SQL server
- MySQL etc….
Other than that, the lists of data warehouse database systems are:
- IBM Netezza
There are other non-relational categories of databases. These are:
- Record-based databases
- XML databases
- Graph databases
Native Python databases are:
What Database API Includes
Using Python structure, DB-API provides standard and support for working with databases. The API consists of:
- Bring in the API module
- Obtain database connection
- Issue SQL statements and then store procedures
- Close the connection
Benefits of Python Database Programming
- Programming in Python is considerably simple and efficient with compared to other languages, so as the database programming
- Python database is portable, and the program is also portable so both can give an advantage in case of portability
- Python supports SQL cursors
- It also supports Relational Database systems
- The API of Python for the database is compatible with other databases also
- It is platform independent
Defining MySQL Database
It is an interface for associating SQL database server from Python and uses the DB-API of Python to work.
How to Implement MySQL Database
To use MySQL database using Python, you need first to install it on your machine; then just type the script given below to implement MySQL within your program.
If any error occurs then it means that the MySQL module is not installed and programmers can download it from - https://sourceforge.net/projects/mysql-python/
Database Program Using Python
# importing the module import MySQLdb # opening a database connection db = MySQLdb.connect ("localhost","testprog","stud","PYDB") # define a cursor object cursor = conn.cursor # drop table if exists Cursor.execute("IF STUDENT TABLE EXISTS DROP IT") # query sql = "CREATE TABLE STUDENT (NAME CHAR(30) NOT NULL, CLASS CHAR(5), AGE INT, GENDER CHAR(8), MARKS INT" # execute query cursor.execute(sql) # close object cursor.close() # close connection conn.close()
There are various operations that programmers can perform within Python program. To deal with these statements, you must have a good knowledge of Database programming and SQL.
|INSERT||It is an SQL statement used to create a record into a table.|
|READ||Fetches useful information from the database.|
|UPDATE||It is used update those available or already existing record(s).|
|DELETE||It is used to delete records from the database.|
|ROLLBACK||It works like "undo", which reverts all the changes that you have made.|