Is SQL Case Sensitivity Consistent Across Different Database Platforms?

Is the case sensitivity of SQL statements consistent on different database platforms?

As a language widely used in database management, the case sensitivity of SQL syntax has always attracted much attention. Although some database platforms such as MySQL and SQL Server appear to be case-insensitive, does this apply to all database platforms?

Case sensitivity of SQL keywords

The SQL specification states that keywords themselves are not case-sensitive. This applies to common commands and clauses such as SELECT, FROM, and WHERE, which are usually capitalized for clarity.

Case sensitivity of table and column names

However, the case sensitivity of table and column names depends on the database platform and configuration. In MySQL, case sensitivity is configurable. By default, table and column names are not case-sensitive on Unix-like operating systems, but are case-sensitive on Windows.

In SQL Server, case sensitivity is affected by the collation setting of the database. By default, SQL Server is not case-sensitive when using a case-insensitive collation (for example, SQL_Latin1_General_CP1_CI_AS); however, you can enable case sensitivity if you use a case-insensitive collation (for example, SQL_Latin1_General_CP1_CS_AS).

Configuration of case sensitivity in MySQL

To enable case sensitivity of table and column names in MySQL, you can use the following configuration option:

<code>lower_case_table_names=0</code>

Setting this option to 0 ensures that MySQL treats table and column names as case-sensitive.

Summary

While SQL keywords themselves are not case-sensitive, the case sensitivity of table and column names varies depending on the database platform and configuration. To determine the case-sensitivity behavior of a specific database system, it is recommended to consult the documentation for that database system.

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