MC Given following query:

SELECT DISTINCT P1.PRODNR, P1.PRODNAME
FROM PRODUCT P1, SUPPLIES S1
WHERE P1.PRODNR=S1.PRODNR AND
1 <= (SELECT COUNT(*) FROM SUPPLIES S2
  WHERE S1.SUPNR <> S2.SUPNR AND P1.PRODNR=S2.PRODNR)
  ORDER BY PRODNR

The query retrieves: The number and name of all products that can be supplied by more than one supplier correct The number and name of all products that cannot be supplied by any supplier incorrect The number and name of all products that only can be supplied by one supplier incorrect The number and name of all products that can be supplied by all suppliers incorrect MC Which of the following queries selects the name of the supplier, corresponding order number and total ordered quantity of the order that has the maximum total quantity ordered. SELECT R1.SUPNAME, POL1.PONR, SUM(POL1.QUANTITY)
FROM SUPPLIER R1, PURCHASE_ORDER PO1, PO_LINE POL1
WHERE R1.SUPNR = PO1. SUPNR AND PO1. PONR = POL1.PONR
GROUP BY POL1. PONR
HAVING SUM(POL1.QUANTITY) >= ALL
(SELECT SUM(POL2.QUANTITY)
FROM SUPPLIER R2, PURCHASE_ORDER PO2, PO_LINE POL2
WHERE R2.SUPNR = PO2.SUPNR AND PO2.PONR = PONR
GROUP BY POL2.PONR) correct SELECT R1.SUPNAME, POL1.PONR, SUM(POL1.QUANTITY)
FROM SUPPLIER R1, PURCHASE_ORDER PO1, PO_LINE POL1
WHERE R1.SUPNR = PO1. SUPNR AND PO1. PONR = POL1.PONR
GROUP BY POL1. PONR
HAVING SUM(POL1.QUANTITY) <= ALL
(SELECT SUM(POL2.QUANTITY)
FROM SUPPLIER R2, PURCHASE_ORDER PO2, PO_LINE POL2
WHERE R2.SUPNR = PO2.SUPNR AND PO2.PONR = PONR
GROUP BY POL2.PONR) incorrect SELECT R1.SUPNAME, POL1.PONR, SUM(POL1.QUANTITY)
FROM SUPPLIER R1, PURCHASE_ORDER PO1, PO_LINE POL1
WHERE R1.SUPNR = PO1. SUPNR AND PO1. PONR = POL1.PONR
GROUP BY POL1. PONR
HAVING SUM(POL1.QUANTITY) >= ANY
(SELECT SUM(POL2.QUANTITY
FROM SUPPLIER R2, PURCHASE_ORDER PO2, PO_LINE POL2
WHERE R2.SUPNR = PO2.SUPNR AND PO2.PONR = POL2.PONR
GROUP BY POL2.PONR) incorrect SELECT R1.SUPNAME, POL1.PONR, SUM(POL1.QUANTITY)
FROM SUPPLIER R1, PURCHASE_ORDER PO1, PO_LINE POL1
WHERE R1.SUPNR = PO1. SUPNR AND PO1. PONR = POL1.PONR
GROUP BY POL1. PONR
HAVING SUM(POL1.QUANTITY) <= ANY
(SELECT SUM(POL2.QUANTITY)
FROM SUPPLIER R2, PURCHASE_ORDER PO2, PO_LINE POL2
WHERE R2.SUPNR = PO2.SUPNR AND PO2.PONR = PONR
GROUP BY POL2.PONR) incorrect MC Given the following SQL query:

SELECT P1.PRODNR
FROM PRODUCT P1
WHERE 5 <=
(SELECT COUNT(*)
FROM PRODUCT P2
WHERE P1.PRODNR < P2.PRODNR)

This query selects: The 5 highest product numbers. incorrect The 5 lowest product numbers. incorrect All product numbers except for the 5 highest product numbers. correct All product numbers except for the 5 lowest product numbers. incorrect MC Given following query:

SELECT R.SUPNAME, (SELECT COUNT(PO.PODATE)
FROM PURCHASE_ORDER PO
WHERE R.SUPNR = PO.SUPNR) AS SUMMARY
FROM SUPPLIER R

The query selects: The supplier name and order date of each of his/her outstanding orders. If a supplier does not have an outstanding order, s/he will be included in the output with a null value for the "SUMMARY" column. incorrect The name and total number of outstanding orders of all suppliers correct The supplier name and order date of each of his/her outstanding orders incorrect The name and total number of outstanding orders of all suppliers that have at least one outstanding order incorrect MC Given the following query:

SELECT PRODNR, AVG(QUANTITY) AS AVG_QUANTITY
FROM PO_LINE
GROUP BY PRODNR
HAVING SUM(QUANTITY < 15)

What is the result? The query returns the PRODNR and average QUANTITY of each purchase order that has less than 15 orders. incorrect The query returns the PRODNR and average QUANTITY of each purchase order that has less than 15 purchase order lines. incorrect The query returns the PRODNR and average QUANTITY of each product for which the total ordered quantity is less than 15. correct The query returns the PRODNR and average QUANTITY of each product that has less than 15 orders. incorrect MC We're interested in wine stores. Therefore, we want to retrieve the SUPNR and SUPNAME of each store which contains 'wine' in its store name. Which of the following queries can we use? SELECT SUPNR, SUPNAME
FROM SUPPLIER
WHERE SUPNAME LIKE "%WINE%" correct SELECT SUPNR, SUPNAME
FROM SUPPLIER
WHERE SUPNAME IS "%WINE%" incorrect SELECT SUPNR, SUPNAME
FROM SUPPLIER
WHERE SUPNAME = "WINE" incorrect SELECT SUPNR, SUPNAME
FROM SUPPLIER
WHERE SUPNAME IS 'WINE' incorrect MC Given the following query:

SELECT P.PRODNR, P.PRODNAME
FROM PRODUCT P
WHERE EXISTS
  (SELECT *
  FROM PO_LINE_POL
  WHERE P.PRODNR = POL.PRODNR
  GROUP BY POL.PRODNR
  HAVING SUM(POL.QUANTITY) > P.AVAILABLE_QUANTITY)

The query retrieves: The name and number of the product with the highest ordered quantity. incorrect The name and number of all products that are ordered and exceed their available quantity. correct The name and number of the product with the lowest ordered quantity. incorrect The name and number of all products that are ordered and do not exceed their available quantity. incorrect MC Compare the following 2 queries:
  1. SELECT COUNT(DISTINCT SUPNR)
    FROM PURCHASE_ORDER
  2. SELECT COUNT(SUPNR)
    FROM PURCHASE_ORDER
Which of the following statements is correct? Result query 1 is always >= result query 2 because query 1 sums the number of purchase orders per supplier while query 2 sums the number of purchase orders in total. incorrect Result query 1 is always = result query 2 because PURCHASE_ORDER contains only unique purchase orders. incorrect Result query 1 is sometimes <= and sometimes >= result query 2 because the result depends on the number of suppliers and the number of purchase orders. incorrect Result query 1 is always <= result query 2 because the DISTINCT operator counts only unique SUPNRs. correct MC Given following query:

SELECT P1.PRODNR, P1.PRODNAME, S1.SUPNR, S1.PURCHASE_PRICE
FROM PRODUCT P1, SUPPLIES S1
WHERE P1. PRODNR = S1.PRODNR
AND NOT EXISTS
(SELECT *
FROM PRODUCT P2, SUPPLIES S2
WHERE P2.PRODNR = S2.PRODNR
AND P1.PRODNR = P2.PRODNR
AND S1.PURCHASE_PRICE > S2.PURCHASE_PRICE)

Given following statements
  1. For each product the supplier number is retrieved of the supplier who can supply the product for the cheapest prices
  2. For each product, the supplier number is retrieved of the supplier who supplies the product for the highest price.
  3. For each product, exactly one tuple is returned
  4. For each product, more than one tuple can be returned


Which statements are true? Statements 2 and 3 incorrect Statements 1 and 4 correct Statements 2 and 4 incorrect Statements 1 and 3 incorrect MC Given the following query:

SELECT P.PRODNR, P.PRODNAME, P.AVAILABLE_QUANTITY, SUM(L.QUANTITY) AS ORDERED_QUANTITY
FROM PRODUCT AS P LEFT OUTER JOIN PO_LINE AS L
ON (P.PRODNR=L.PRODNR)
GROUP BY P.PRODNR

Which of the following statements is incorrect? The query result can never contain NULL values. correct The query retrieves the product number, product name and available quantity of each product thanks to the left outer join. incorrect The query retrieves for each product the total ordered quantity. incorrect If we remove the GROUP BY statement and P.PRODNR, P.PRODNAME, P.AVAILABLE_QUANTITY from the SELECT statement, the query will result in 1 row containing the total outstanding ordered quantity over all products in column 'ORDERED_QUANTITY'. incorrect