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:

SELECT CASE WHEN 'A' = 'a' THEN '不区分大小写' ELSE '区分大小写' END

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

SELECT SERVERPROPERTY('COLLATION')

Check database collation

SELECT DATABASEPROPERTYEX('AdventureWorks', 'Collation') AS SQLCollation;

Check column sorting

SELECT table_name, column_name, collation_name
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = @table_name

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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