How can the issue of invalid Oracle identifiers be reso…

The Oracle database error message “invalid identifier” may be caused by the following reasons:

1. Misspelling of identifier: Please check if you have entered the identifier correctly, including the capitalization.
2. Identifiers containing special characters should be enclosed in quotation marks. For example, if the identifier is “First Name”, it should be written as “‘First Name'”.
3. Identifiers using Oracle reserved words: Oracle databases have certain reserved words that cannot be used as identifiers. Please make sure that your identifier is not an Oracle reserved word.
4. The length of the identifier exceeds the database limit: Oracle database has a limit of 30 characters for identifiers. If your identifier exceeds this limit, shorten its length.

Solution:

1. Carefully check the spelling of the identifiers and ensure proper capitalization.
2. Enclose identifiers in quotation marks, especially those containing special characters.
3. Change identifiers to avoid using Oracle reserved words.
4. Shorten the length of the identifier to ensure it does not exceed the database limits.

If the above methods still do not solve the problem, it is recommended to provide more detailed information, such as specific error messages and the SQL statements used, in order to better assist you in resolving the issue.