What is Informatica ETL Testing?

What is Informatica ETL Testing?

ETL or Extract, Transform and Load is a process that gathers data from source systems, transforms the data into meaningful information, then loads the data into a data warehouse. ETL testing refers to the process of validating, verifying, and authorizing data by preventing data duplication and loss.

How do I prepare unit test cases in Informatica?

Unit Testing

1. Quantitative Testing.
2. Validate your Source and Target. a) Ensure that your connectors are configured properly.
3. Analyze the Load Time. a) Execute the session and review the session statistics.
4. Analyze the success rows and rejections.
5. Performance Improvement.
6. Qualitative Testing.

What is test scenario in ETL Testing?

Test Scenarios. Test-Cases. Structure Validation. It involves validating the source and the target table structure as per the mapping document. Data type should be validated in the source and the target systems.

How do you validate data in Informatica?

Data Validation Process

1. Determine the validation requirements.
2. Optionally, create a data validation view to represent one or more data sources.
3. Create a table object that contains one or more data sources or views.
4. Create a test to validate data in the table object.
5. Run the test.
6. View test results.

How ETL testing is done?

What are the 8 stages of the ETL testing process?

1. Identify your business requirements.
2. Assess your data sources.
3. Create test cases.
4. Begin the ETL process with the extraction.
5. Perform the necessary data transformation.
6. Load the data into the target destination.
7. Document your findings.

Is ETL testing Easy?

Because traditional ETL processes are highly complex and extremely sensitive to change, ETL testing is hard.

How unit testing is done in Informatica?

If the source and target database is teradata then you can use MINUS command between source and target. When it returns zero records then it means testing is successful.

What is ETL testing interview questions?

ETL Interview Questions for Freshers

• What is the importance of ETL testing?
• Explain the process of ETL testing.
• Name some tools that are used in ETL.
• What are different types of ETL testing?
• What are the roles and responsibilities of an ETL tester?
• What are the different challenges of ETL testing?

What are the five stages of ETL testing?

ETL testing is performed in five stages:

• Identifying data sources and requirements.
• Data acquisition.
• Implement business logic and Dimensional Modeling.
• Build and populate data.
• Build Reports.

What are different types of ETL testing?

ETL testing fits into four general categories: new system testing (data obtained from varied sources), migration testing (data transferred from source systems to data warehouse), change testing (new data added to data warehouse), and report testing (validate data, make calculations).

How do you validate a flat file in ETL testing?

1. Record Count Validation. Compare count of records of the flat file and database table.
2. Column Data Profile Validation.
3. Compare Entire Flat File and Target Data.
4. Automate Flat File Data Completeness Testing using ETL Validator.

How do you validate a source and target in Informatica?

Validating Dynamic Sources and Targets

1. In the Developer tool, right-click a mapping in the editor or the Object Explorer view.
2. Select one of the following mapping parameters options:
3. Click.
4. Right-click the run-time instance of the mapping and select.
5. When the mapping is valid, click.

How many types of ETL tests are there?

What is ETL Developer Salary?

ETL Developer salary in India ranges between ₹ 3.6 Lakhs to ₹ 10.0 Lakhs with an average annual salary of ₹ 5.4 Lakhs. Salary estimates are based on 3.2k salaries received from ETL Developers.

What are types of unit testing?

There are 2 types of Unit Testing: Manual, and Automated.

What is the purpose of unit testing?

The main objective of unit testing is to isolate written code to test and determine if it works as intended. Unit testing is an important step in the development process, because if done correctly, it can help detect early flaws in code which may be more difficult to find in later testing stages.

What are the 3 layers in ETL?

The three approaches are − top-down, bottom-up, and hybrid. What are the common ETL Testing scenarios?

What is a 3 tier system in ETL?

To sum up, the processes involved in the Three Tier Architecture are ETL, querying, OLAP and the results produced in the Top Tier of this three-tier system. The front-end activities such as reporting, analytical results or data-mining are also a part of the process flow of the Data Warehouse system.

How do you write test cases in ETL?

The Future of Big Data

1. Step 1: Analysis the requirement and data model of AW layer table.
2. Step 2: List out the source and destination.
3. Step 3: Go through the ETL mapping for patient anchor table and start creating test cases based on the above test point and transformation rules mentioned in ETL mapping.

Is ETL testing a manual testing?

As mentioned earlier, ETL testing is primarily conducted manually, which makes it a very labor intensive and error prone process. Automating ETL tests allows frequent smoke and regression testing without much user intervention and supports automated testing on older code after each new database build.

How many layers are in ETL Testing?

A typical ETL tool-based data warehouse uses staging area, data integration, and access layers to perform its functions. It’s normally a 3-layer architecture.

Is a CSV a flat file?

One of the most prominent flat file examples is a comma-separated values (CSV) file. A CSV file is one in which table data is gathered in lines of American Standard Code for Information Interchange (ASCII) text with the value from each table cell separated by a comma and each row represented by a new line.

How do you validate a flat file in ETL Testing?

How do you validate a view?

The View Manager component allows you to validate the view to make sure that all of the EQL is valid and that the attribute names match the definition. To validate a view, while editing the view, click Validate. To validate the view, the View Manager component issues a query using the view definition.

Is SQL required for ETL testing?

ETL Testing involves comparing of large volumes of data typically millions of records. The data that needs to be tested is in heterogeneous data sources (eg. databases, flat files). Data is often transformed which might require complex SQL queries for comparing the data.