SQL

Explain why the following command would create an error, and what changes could be made to fix the error.

SELECT V_CODE, SUM(P_QOH)
FROM PRODUCT;

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  1. You are missing the Group by:
    See the explanation from the Book
    The GROUP BY clause is valid only when used in conjunction with one of the SQL aggregate functions, such as
    COUNT, MIN, MAX, AVG, and SUM. For example, as shown in the first command set in Figure 7.26, if you try to
    group the output by using:
    SELECT V_CODE, P_CODE, P_DESCRIPT, P_PRICE
    FROM PRODUCT
    GROUP BY V_CODE;
    you generate a “not a GROUP BY expression” error. However, if you write the preceding SQL command sequence
    in conjunction with some aggregate function, the GROUP BY clause works properly. The second SQL command
    sequence in Figure 7.26 properly answers the question

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  2. Walter coming in just a month shy of 4 years after the question was asked. And they said millenials can't focus!

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