Is My SQL Server Database Case-Sensitive?

Exploring the case sensitivity of SQL Server databases

This article explores various ways to check the case sensitivity of a SQL Server database. This requirement stems from problems encountered when executing the following query:

<code class="language-sql">SELECT CASE WHEN 'A' = 'a' THEN '不区分大小写' ELSE '区分大小写' END</code>

Another approach is to determine the server's collation. Collation determines the rules for data comparison, including case sensitivity. Here are the steps to check the different levels of collation:

Check server collation

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

Check database collation

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

Check column sorting

<code class="language-sql">SELECT table_name, column_name, collation_name
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = @table_name</code>

Understanding these levels of collation can help determine whether the database or any particular column is case-sensitive. This information is critical for resolving issues such as inconsistent data comparisons and ensuring data integrity.

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