What is Data Validation Testing?
Data Validation testing is a process which allows the user to check that the provided data, they deal with, is valid or complete. Data Validation Testing responsible for validating data and database successfully through any needed transformations without loss. It also verifies that the database stays with specific and incorrect data properly. In simple words, data validation is a part of Database testing, in which individual checks that the entered data valid or not according to the provided business conditions.
How Does Data Validation Testing Work?
Data Validation process consists of four significant steps.
Detail Plan – It is the most critical step, to create the proper roadmap for data validation. It deals with the overall expectation if there is an issue in source data, then how to resolve that issue? It deals in defining the number of iterations, required during data validation.
Validate the database – This is responsible for ensuring that all the applicable data is present from source to sink. This step is responsible for determining the number of records, size of data, comparison of source and target based on the data field.
Validate Data Formatting – The main focus is that the data clearly understood in the target system, the end users should clearly understand data whether it is meeting the business expectation or not.
Sampling – Before testing on the large set of data, it is necessary to do sampling. It is essential to do testing on the small amount of data and check if the sample data meets the business requirement, if yes then only proceed with a large set of data. It will also decrease the error rate for data and increase the quality and accuracy of the data.
Benefits of Data Validation Testing
Through Data Validation testing, ensure that the data collected is accurate, qualitative and healthy. Is the collected data from different resources, meet the business requirement or not?
Below are several benefits to Data Validation testing –
- Business requirement – Data validation testing helps an individual to ensure that the data collected from different sources, may be structured or unstructured, meet the Business requirement or not.
- Data Accuracy – In future, the volume of data increases and most probably, most of the data will be unstructured. It's impossible to imagine to analyze this amount of data. Before mining, it is necessary to convert this data into a structured format. So it's better to deal with the right kind of the data only which meets business requirements.
- Better Decision Making
- Better Strategy and Enhanced Market Goals
- Increased Profits and Reduced Loss – If the data is accurate and correctly analyzed, then obviously there will be less loss, and on the other hand, there will be an increase in profit.
Why Data Validation Testing Matters?
Regarding Big Data, Data Validation is one of the most critical components of data collection. Data Validation Testing matters because it helps an individual to ensure that the data, dealing with is not corrupted and also responsible for checking that the provided data is accurate or not. It also helps in verifying that the information provided validated against the actual business requirement or not. The initial data fed into the Hadoop Distributed File System (HDFS) and validated.
How to Adopt Data Validation Testing?
There are various approaches and techniques to accomplish the Data Validation testing.
- Data Accuracy testing to ensure that the provided data is correct.
- Data Completeness testing to check whether the data is complete or not.
- Data Transformation Testing to verify that the provided data goes successfully through transformations or not.
- Data Quality testing to handle bad data.
- Database comparison testing to compare the source DB and target DB.
- End to End testing.
- Data warehouse testing.
Best Practises of Data Validation Testing
- It is highly recommended to analyze the data to understand the requirement which is a need for business purpose.
- Handle bad data correctly.
- Use of the particular tool which fits perfectly between source and target.
- Firstly, test on sample data instead of full complete data. This process will save time as well as resources also.
- Compare the output result with the expected.
Key Data Validation Testing Tools
There are various tools which are available in the market for data validation. Some of them given below –