Why Am I Getting ORA-00942 Even Though the Table Exists?

ORA-00942: Resolving "Table or View Does Not Exist" Error When Inserting Data

When encountering the SQL error "ORA-00942 table or view does not exist," it is often attributed to missing privileges or non-existent tables/views. However, another potential cause that can be overlooked is the lack of select privilege on a sequence used to generate default values.

To illustrate this, consider the following scenario: a sequence named "seq_customer_id" is used to define the default value for a column in a table named "customer." When a user with insufficient privileges tries to insert data into the table without explicitly specifying a value for the column, the database attempts to fetch the next value from the sequence but fails due to missing select privileges. As a result, the error "ORA-00942" is thrown.

To resolve this issue, grant the user select privilege on the sequence:

grant select on seq_customer_id to user2;

Once the user has the necessary privileges, they can successfully insert data into the table:

insert into user1.customer (name,surname) values ('michael','jackson');

This solution addresses a specific cause of the ORA-00942 error that may not be immediately apparent. By identifying and addressing this potential issue, you can effectively resolve the error and ensure smooth data insertion.

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