Database : From the above image, we can see that , database is an organized collection of data set under different fields.It can be accessed electronically. Basically, databases are used to manage tons of data which are not possible to manage manually.

Background : The concept of database was initiated in 1960, when the computer scientists couldn’t manage lots of data.One of the first organizations that used database system for the “US.Census Bureau” was IBM. 

In today's date , database has become the integral part of day to day life of different organizations and systems.

Database Language : Database languages are used by the developers , to access the database tables.By the help of the language tools, he/she can perform various operations of databases as per user needs.

Database Testing

Database testing ensures data values and information received and stored in database system are valid or not.It ensures the entire security of data by doing various types of testing like SQL injection, not letting unauthorized users access data.Testers should have a good grasp of SQL knowledge to get database testing skill.

Suppose, if a tester does the database testing of banking application, what he/she does in that is given below- 

  1. The tester checks whether the application stores the entered data , gets   saved or not.

  2. The tester checks if the values that are displayed to the user are correct, complete, valid or not by doing UAT.

  3. None of the information is aborted in the entire process.

  4. To check if the information that is removed in the process, still stays in the database tables or not.

  5. To check if unauthorized users can access the database or not.

Basically, this type of testing falls under the backend testing area. In the UI testing phase , this testing is usually not done.The tester needs access to the backend for database testing.

What do database testers mostly do?

In the first picture, as a database tester, the tester will check all the column rows and integrated data inside the table as a tester and validate them. Besides, some of the techniques are given below - 

Data Manipulation : 

Basically CRUD operation is performed here. It ensures proper storing of data and at the same time retrieval of data can be verified.

SQL injections attacks can also be performed here.

Performance Testing : 

Whenever, there is high load of data entries, concurrent users or large amount of data volumes, the testers check the performance of database for performance testing.They check the response times, how many units they are performing under pressure and also to check the performance system time.By doing performance testing, a tester gets the confidence of delivering the system without any doubt, because they already know that it can handle loads of amount of data without any disturbance.

Also, the tester does the security testing,schema and trigger testing too while doing the testing operation.

In fine , it can be said that, to maintain the database of a system is a must. And database testing helps to keep the database system running without any error and issue. Due to the database system, the projects and websites or systems don't face any system crash.The tech enthusiasts must know the use of databases with proper knowledge and also the testers must have the idea of testing databases with various testing techniques and tools.