How Can I Update Multiple Tables Atomically in SQL Server 2005?

Atomically Updating Multiple Tables in SQL Server 2005: A Transactional Approach

SQL Server 2005 doesn't directly support updating multiple tables with a single statement. However, maintaining data integrity during multi-table updates is achievable using transactions.

Leveraging Transactions for Data Integrity

A transaction groups database operations into an atomic unit. Either all operations succeed, or none do. This ensures consistent updates across all involved tables. The example below illustrates updating two tables transactionally:

<code class="language-sql">BEGIN TRANSACTION;

UPDATE Table1
SET LastName = 'DR. XXXXXX'
FROM Table1 T1 INNER JOIN Table2 T2 ON T1.id = T2.id
WHERE T1.id = '011008';

UPDATE Table2
SET WAprrs = 'start,stop'
FROM Table1 T1 INNER JOIN Table2 T2 ON T1.id = T2.id
WHERE T1.id = '011008';

COMMIT;</code>

The UPDATE statements are enclosed within a transaction. Should an error occur during either update, the entire transaction is rolled back, preserving data consistency. Note the use of INNER JOIN for clearer and more efficient joins.

Important Consideration: Performance and Transaction Usage

While transactions safeguard data integrity, overuse can negatively impact performance. Employ transactions strategically, particularly when dealing with large-scale updates.

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