a. Write a SELECT statement that returns two columns: vendor_id and the largest
ID: 3816157 • Letter: A
Question
a. Write a SELECT statement that returns two columns: vendor_id and the largest unpaid invoice for each vendor. To do this, you can group the result set by the vendor_id column. This should return 7 rows.
b. Write a second SELECT statement that uses the first SELECT statement in its FROM clause. The main query should return a single value that represents the sum of the largest unpaid invoices for each vendor.
this is from the database systems of computer science. can you please solve a and b. thank you.
Explanation / Answer
a. Write a SELECT statement that returns two columns: vendor_id and the largest unpaid invoice for each vendor. To do this, you can group the result set by the vendor_id column.
b. Write a second SELECT statement that uses the first SELECT statement in its FROM clause. The main query should return a single value that represents the sum of the largest unpaid invoices for each vendor.
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