How do I unit test a SQL query?

Should I unit test SQL queries?

SQL unit testing plays a key role in the modern database development cycle because it allows us to test individual parts of the database objects work as expected. SQL unit testing adds a great worth to the database project because unit tests are more reliable then manual test methods.

How do you test a database query?

Here are some guidelines:

  1. Use an isolated database for unit testing (e.g. No other test runs or activity)
  2. Always insert all the test data you intend to query within the same test.
  3. Write the tests to randomly create different volumes of data e.g. random number of inserts say between 1 and 10 rows.

How do I test a SQL function?

Building out the test data using SQL Prompt

  1. SELECT f. …
  2. SELECT LEFT(‘00000000’, CONVERT(INT, RAND() * 6)) + CONVERT(VARCHAR(10), CONVERT(INT, RAND() * 1000000))
  3. SELECT LEFT(‘00000000’, CONVERT(INT, RAND() * 6)) + CONVERT(VARCHAR(10), CONVERT(INT, RAND() * 1000000))
  4. ) f(RandomNumberWithLeadingZeros)

How do I test a SQL query in Junit?

1 Answer

  1. Chose a proper set of parameter values.
  2. (Optionally) Initialize the tested component in a required initial state.
  3. Invoke the tested method.
  4. Check that the returned result is equal to the expected result.
  5. Clean up the tested component not to let any “dirt” from the executed test.
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How do I test SQL queries online?

How to test MySQL queries online?

  1. Enter your SQL query in the editor, finally click on “Run” to execute it. The query result will be displayed below the editor .
  2. You can also run only one query entered in the editor. …
  3. If you want to export the results in csv format, click on “Export”.

How do you test a big query?

Unit tests in BigQuery (standard) SQL

  1. Create BigQuery object (dataset, table, UDF) to meet some business requirement.
  2. Create a SQL unit test to check the object.
  3. Run SQL unit test to check the object does the job or not.
  4. If the test is passed then move on to the next SQL unit test.

How do you test data validation?

Steps to data validation

  1. Step 1: Determine data sample. Determine the data to sample. …
  2. Step 2: Validate the database. Before you move your data, you need to ensure that all the required data is present in your existing database. …
  3. Step 3: Validate the data format.

How do you check data integrity in a database?

How to test Data Integrity :

  1. Check whether you can add, delete, modify ay data in tables.
  2. Check whether a blank or default value can be retrieved from Database.
  3. Verify that radio buttons show right set of values.
  4. Check when a set of data is saved successfully in Database, truncation must not occur.

What test is needed for Tsql?

regular T-SQL. SQL Test uses the open-source tSQLt framework, a set of T-SQL tables, views, stored procedures, and functions. SQL unit testing runs through simple queries which use the framework to check the values of your data types and to mock database objects.

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What is code drop in testing?

A “code drop” is a completed build ready for deployment to an environment. That could be production, QA/Test, etc.

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