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Bigquery Sandbox. It's not testing but is great for doing complex SQL as it's free and you can access public data sets without needing to load anything.

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Write a query to return the list of customers NOT referred by the person with id '2'. For the sample data above, the result is: +--- ...

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Finally, use the DEALLOCATE command to remove the cursor definition and free up the resources connected with it. Q28. List the different types ...

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2. Use COALESCE to replace NULL values in a column with 'Unknown'. 3. How can you secure your SQL queries against SQL injection attacks?

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Q #1) What is SQL? Answer: Structured Query Language SQL is a database tool that is used to create and access the database to support software applications. Q # ...

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What is Union, minus and Interact commands? MINUS operator is used to return rows from the first query but not from the second query. INTERSECT operator is used ...

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