How Can I Update Multiple Tables in a Single SQL Server 2005 Statement?

SQL Server 2005: Efficiently Updating Multiple Tables

SQL Server 2005 doesn't directly support updating multiple tables within a single statement. However, two effective strategies achieve this: transactions and batch updates.

Method 1: Transactional Updates

Transactions ensure atomicity; all updates succeed or none do. A failed update rolls back all changes. Use BEGIN TRANSACTION and COMMIT to manage this:

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

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

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

COMMIT;</code>

(Note: The original example used implicit joins. This revised example uses explicit INNER JOIN for clarity and better readability.)

Method 2: Batch Updates

Batch updates execute multiple statements in a single database call, potentially boosting performance. Use the GO statement as a delimiter:

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

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

GO

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

COMMIT;</code>

The GO command separates the updates into a single batch for execution. Remember that GO is a client-side command, not part of standard SQL. Its effect depends on your SQL client tool.

Choose the method that best suits your needs. Transactions guarantee data integrity, while batch updates can offer performance advantages.

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