How Can I Efficiently Verify SQL Server Case-Sensitivity at Different Levels?

Efficiently verify SQL Server case sensitivity

When managing a SQL Server database environment, determining case sensitivity is critical for data integrity and efficient operation. While a user-supplied query (compare 'A' and 'a' for equality) can provide an indication, it may not always produce reliable results.

To more accurately assess case sensitivity, be sure to consider the concept of collation. Collation defines the rules for comparing and sorting characters in a database. It can be set at multiple levels: server, database and column.

Check server collation

To determine the case sensitivity of a SQL Server instance, you can use the following query:

<code class="language-sql">SELECT SERVERPROPERTY('COLLATION')</code>

This query returns the server's default collation information, which includes case sensitivity settings.

Check database collation

To check the case sensitivity of a specific database, you can use the following query:

<code class="language-sql">SELECT DATABASEPROPERTYEX('AdventureWorks', 'Collation') AS SQLCollation;</code>

Replace 'AdventureWorks' with the name of the database you want to check. This query returns collation information for the specified database.

Check column sorting

In some cases, it may be necessary to verify the case sensitivity of individual columns in a table. You can use the following query to achieve this:

<code class="language-sql">SELECT TABLE_NAME, COLUMN_NAME, COLLATION_NAME
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = @table_name;</code>

Replace '@table_name' with the name of the table whose columns you want to check. This query queries information about table columns and their respective collations.

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