How Can I Escape Restricted Characters in SQL Column Names?

Working with Restricted Characters in SQL Column Names

SQL imposes restrictions on the characters allowed in column names. To use column names containing these restricted characters, database systems offer escaping mechanisms.

The SQL standard uses double quotes (") as identifier delimiters, enabling the use of special characters within column names. Major database systems like Oracle, PostgreSQL, MySQL, MSSQL, and SQLite support this approach.

However, there are system-specific considerations. MySQL necessitates ANSI mode for this functionality, while SQL Server needs QUOTED_IDENTIFIER set to ON. It's crucial to remember that not all systems default to double quotes as delimiters.

Illustrative Example:

<code class="language-sql">SELECT * FROM "`my_column`"</code>

This query demonstrates escaping the column name my_column, allowing its use despite containing restricted characters.

The above is the detailed content of How Can I Escape Restricted Characters in SQL Column Names?. For more information, please follow other related articles on the PHP Chinese website!