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Data Testing Using SQL

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Data base testing is the Type of software testing, which checks schema, table , triggers etc. database is an organized collection of data. Database testing consists mostly of constructing SQL queries to assert and validate different database operations. Database testing is a layered process. i.e, User Interface (UI) layer, a Business layer, a Data Access layer. When we perform database testing, should ensure about database’s efficiency, maximum stability, performance, and security. To perform database testing, we must have a basic knowledge of SQL. database testing is also called Backend testing Or Data validation.

Objectives of Database Testing :

Transactional ACID Properties – Atomicity, Consistency, Isolation, and Durability . Atomicity – It means Transaction is Pass Or Fail .When a single part Of transaction is Fails , IT means the complete transaction has failed , its is known as “all-or-nothing” rule. Consistency – A transaction will always result in a valid state of the DB. Isolation – If there are Multiple transaction execute all at once ,the DB should be the same as if they were executes one after the other. Durability: If a transaction Is In complete status, no any other external factors should be able to change it .

Data Integrity– It ensures when we change or update any data in the data in the database. It get reflects In the all forms. Accuracy of Business Rules– Complicated databases lead to complicated components and complicated queries and, testers should always use corresponding SQL queries to validate complex objects like triggers, procedures, etc. Data Mapping– In data mapping, check and analyze the front end fields are mapping correctly on equivalent fields in the database table. CRUD operations are implements at the Backend. C: Create – If a create Operation Performs through- user ‘Save’ any new transaction . R: Retrieve –If a retrieve Operation Performs through-user ‘Search’ or ‘View’ any saved transaction,
U: Update –If a Update Operation Performs through- user ‘Edit’ or ‘Modify’ an existing record.
D: Delete – If a ‘Delete’ operation’ Performed through-user ‘Remove’ any record from the system.

 Database Components:

  • Database schema– its used To describe the structure Of the database. Transactions – accessing and retrieving data’s from database. Stored Procedures – It is the Group of statements Or Functions, which controlling the transactions in the database. Field constraints – it is another database testing component. the complete database system works on the default value, exclusive value, primary key etc. Triggers – when a certain event occurs In table, trigger will executed Via auto instruction.

processes involved in Database Testing

Setup a testing environment– Setting up a Good testing environment for a good quality of a testing process.

Generate a test scenario– once we set up the testing environment then create the testcases , it include different Inputs and transactions.

Execution– It is the Crucial face for database testing .execute all of the Created testcases.

Analysis– now after executing the testcases , then we have analysis all the Output values , which matches With the expected results.

Log defects– This is the last phase in the database testing Process. In this step tester must inform the developer about the issues or defects in the database application.

Types of Database Testing – It divided Into 3 types.

Structural Testing

It include table testing, schema testing, view testing etc. mainly performed by the data administrator who have strong knowledge In SQL concepts. classified into Schema / Mapping Testing, Stored Procedures and Views Testing, Trigger Testing, Database Server Check.

Functional Testing

– It is the Most important Type of database testing, It handles database functional requirements. It classified as Black Box Testing and White Box Testing.

Black box testing

testers no need To worried About the Internal Functional and code wise logics. need To verify integrated database system for checking the functionalities.

White Box testing – Testers need to know about the internal structure of the database and must have the Knowledge about the internal functionality and programming codes also Non-Functional Testing– It involves less system requirements to meet the Business specifications. It involves Load Testing and Stress Testing. Load testing-This is type of performance testing ,it determine how your web application will behave during normal and high load conditions. Stress Testing– To identify the system breakpoint. This point of failure for a system is called the database system breakpoint. Stress testing Tools are- Load runner & Win runner.


Data base testing is very important process. Which helps to validate the data and checking database Functionality. With all these features, factors and processes to test on a database, there is an increasing demand for the testers to be technically proficient in the key Database concepts.