How to Fix the ORA-00942 Error: Table or View Does Not Exist When Inserting Data?

Troubleshooting the "ORA-00942: table or view does not exist" Error for SQL Inserts

The ORA-00942 error occurs when a user attempts to insert data into a table or view that does not exist in the specified database. This error arises when the requested table or view is not recognized by the database system.

Potential Cause:

In the provided example, the error occurs when attempting to insert data into the "customer" table. However, the posted solution focuses on a specific scenario involving table sequences and permissions for non-owner users.

Alternative Cause:

An additional possible cause of this error, especially in Oracle 12c, is that the user executing the insert query may not have the necessary privileges on the sequence used to generate default values for the table.

Resolution:

To resolve the error in such cases, grant the user "select" privileges on the sequence. The following steps demonstrate how to grant select privilege on the sequence "seq_customer_id":

1. Ensure that the user has appropriate permissions on the table itself, including insert privileges.
2. Use the following SQL syntax:

grant select on sequence_name to username;

For example, to grant select privilege on the sequence "seq_customer_id" to the user "user2":

grant select on seq_customer_id to user2;

Once the sequence privileges have been granted, the insert query should succeed. Remember to prefix the table name with the schema owner name if necessary, as demonstrated in the original error message.

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