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"field | variable" is not unique and must be qualified (Error 1832)

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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 customer and orders tables:

SELECT cust_id FROM customer,orders

  • To work around the non-uniqueness of field names, issue the following command:

    SELECT customer.cust_id FROM customer,orders

    For more information, see SELECT - SQL.