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  3. Transactions and Error Handling in SQL Server
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Exercise

Using error functions in a nested TRY...CATCH

You received some new electric bikes in your store, so you need to update the stock.

You want to register that you received 2 Trek Powerfly 5 - 2018 bikes with a price of $3499.99 each, and 3 New Power K- 2018 bikes at $1999.99 each.

You try to insert the products in the database because you think they are new models. However, you forgot you already have the first one in stock. Luckily, the products table has a constraint requiring every product name to be unique.

You prepare a script controlling possible errors in the insertions. You also want to insert possible errors in a table called errors, and, if something fails when inserting the error, show the error number and error message.

Instructions

100 XP
  • Surround the error handling with a CATCH block.
  • Insert 'Error inserting a product' in the errors table and surround this insertion with another TRY block.
  • Surround the nested error handling with another CATCH block.
  • Select the error line and the error message in the inner CATCH block.