Viewing Oracle Errors in the Oracle Database

In Oracle databases, ORA errors can be checked by viewing database log files and using SQL statements.

1. View database log files: In the installation directory of the Oracle database, there is a log file called alert_database instance name. log. You can use a text editor (such as Notepad++) to open the file and search for lines containing ORA errors.

2. Use SQL statements to query error information: The following two system views can be used to query ORA error information:

V $DIAG.INFO: This view contains the current log file path and name of the database.

V $DIAGINGIDENT: This view contains diagnostic events and error information for the database.

You can use the following SQL statements to query ORA error information:

SELECT * FROM V$DIAG_INFO;SELECT * FROM V$DIAG_INCIDENT;

These queries will return error information about the database, including error codes (ORA-XXXXXX) and error descriptions.

Additionally, Oracle database management tools such as SQL * Plus or PL/SQL Developer can be used to perform queries and view error messages.