When creating databases and tables, you use names, formally called identifiers, that are clear, meaningful, and easy to type. The identifiers :

• Should only contain letters, numbers, and the underscore (no spaces 0.
• Should not be the same as an existing keyword.
• Should be treated as case-sensitive.
• Cannot be longer than 64 characters.
• Must be unique (i.e. a database cannot have two tables with the same name.