| title | Identifiers Limitations | Microsoft Docs | ||
|---|---|---|---|
| ms.custom | |||
| ms.date | 01/19/2017 | ||
| ms.prod | sql | ||
| ms.prod_service | connectivity | ||
| ms.reviewer | |||
| ms.technology | connectivity | ||
| ms.topic | conceptual | ||
| helpviewer_keywords |
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| ms.assetid | b3466382-71cb-4f82-8318-092a8fcef3df | ||
| author | David-Engel | ||
| ms.author | v-daenge |
If an identifier contains a space or a special symbol, the identifier must be enclosed in back quotes. A valid name is a string of no more than 64 characters, of which the first character must not be a space. Valid names cannot include control characters or the following special characters: ` | # * ? [ ] . ! $ .
Do not use the reserved words listed in the SQL grammar in Appendix C of the ODBC Programmer's Reference (or the shorthand form of these reserved words) as identifiers (that is, table or column names), unless you surround the word in back quotes (`).