Final answer:
To query the custid from Customers and empid from Employees according to the ANSI 92 standard, a basic SELECT statement is used. Specific JOIN clauses are typically required to avoid a Cartesian product and relate tables properly, but without relationship details, the provided query selects the columns independently.
Step-by-step explanation:
The American National Standards Institute (ANSI) 92 standard refers to the SQL language standard set in the year 1992. To retrieve the custid from the Customers table and the empid from the Employees table, the SQL query would be written as:
SELECT Customers.custid, Employees.empid
FROM Customers, Employees;
This query selects two columns, one from each table. However, without specifying the relationship between these tables, this would produce a Cartesian product, which pairs every record of the first table with every record of the second table. Typically, you would use a JOIN clause with an ON statement to specify the condition for joining the records, for instance based on a foreign key. Without further information on how these tables are related, we can't provide a more specific SQL statement.
When writing SQL queries conforming to the ANSI 92 standard, it is important to be aware of the specific syntax required, as well as best practices for structuring queries to avoid potentially large and unmanageable data sets unless absolutely necessary.