Nesting TRY...CATCH constructs

You want to register a new buyer in your buyers table. This new buyer is Peter Thomson. His e-mail is [email protected] and his phone number is 555000100.

In your database, there is also a table called errors, in which each error is stored.

You prepare a script that controls possible errors in the insertion of this person's data. It also inserts those errors into the errors table.

How do you prepare the script?

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Transactions and Error Handling in SQL Server

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Anleitung zur Übung

Surround the INSERT INTO buyers statement with a TRY block.
Surround the error handling with a CATCH block.
Surround the INSERT INTO errors statement with another TRY block.
Surround the nested error handling with another CATCH block.

Interaktive Übung

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-- Set up the first TRY block
___ ___
	INSERT INTO buyers (first_name, last_name, email, phone)
		VALUES ('Peter', 'Thompson', '[email protected]', '555000100');
___ ___
-- Set up the first CATCH block
___ ___
	SELECT 'An error occurred inserting the buyer! You are in the first CATCH block';
    -- Set up the nested TRY block
    ___ ___
    	INSERT INTO errors 
        	VALUES ('Error inserting a buyer');
        SELECT 'Error inserted correctly!';
	___ ___
    -- Set up the nested CATCH block
    ___ ___
    	SELECT 'An error occurred inserting the error! You are in the nested CATCH block';
    ___ ___ 
___ ___

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