> For the complete documentation index, see [llms.txt](https://mysql-api.gitbook.io/jhonatas48_mysqlapi/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mysql-api.gitbook.io/jhonatas48_mysqlapi/readme/classes/icreateatribute/notnull.md).

# NotNull

Define um campo como não anulável no banco de dados