You have referenced a field that exists in more than one table.
For example, if you use the TESTDATA database and issue the following command, the same error occurs because the
cust_id field exists in both the
SELECT cust_id FROM customer,orders
To work around the non-uniqueness of field names, issue the following command:
For more information, see SELECT - SQL Command.
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SELECT customer.cust_id FROM customer,orders