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NEW QUESTION: 1
A. Option B
B. Option C
C. Option D
D. Option A
Answer: D
NEW QUESTION: 2
You generate a daily report according to the following query:
The Sales.ufn.GetLastOrderDate user-defined function (UDF) is defined as follows:
You need to improve the performance of the query.
What should you do?
A. Drop the UDF and rewrite the report query as follows:
SELECT c.CustomerName
FROM Sales.Customer c
WHERE NOT EXISTS (
SELECT s.OrderDate
FROM Sales.SalesOrder s
WHERE s.OrderDate > DATEADD(DAY, -90, GETDATE())
AND s.CustomerID = c.CustomerID)
B. Drop the UDF and rewrite the report query as follows:
WITH cte (CustomerID, LastOrderDate) AS (
SELECT CustomerID, MAX (OrderDate) AS [LastOrderDate]
FROM Sales.SalesOrder
GROUP BY CustomerID
)
SELECT c.CustomerName
FROM cte
INNER JOIN Sales.Customer c ON cte.CustomerID = c.CustomerID
WHERE cte.LastOrderDate < DATEADD(DAY, -90 GETDATE())
C. Rewrite the report query as follows:
SELECT c.CustomerName
FROM Sales.Customer c
WHERE (SELECT OrderDate FROM Sales.ufnGetLastOrderDate(c.CustomerID)) <DATEADD(DAY, -90, GETDATE()) Rewrite the UDF as follows:
CREATE FUNCTION Sales.ufnGetLastOrderDate(@CustomerID int)
RETURNS @OrderTable TABLE (OrderDate datetime)
AS
BEGIN
INSERT @OrderTable
SELECT MAX(s.OrderDate) As OrderDate
FROM Sales.SalesOrder s
WHERE s.CustomerID = @CustomerID
RETURN
END
D. Rewrite the report query as follows:
SELECT c.CustomerName
FROM Sales.Customer c
WHERE (SELECT OrderDate FROM Sales.ufnGetLastOrderDate(c.CustomerID)) < DATEADD(DAY, -90, GETDATE()) Rewrite the UDF as follows:
CREATE FUNCTION Sales.ufnGetLastOrderDate(@CustomerID int)
RETURNS @OrderTable TABLE (OrderDate datetime)
AS
BEGIN
INSERT @OrderTable
SELECT MAX(s.OrderDate) As OrderDate
FROM Sales.SalesOrder s
WHERE s.CustomerID = @CustomerID
RETURN
END
Answer: B
Explanation:
We use a Common Table Expression (TBE) to optimize the query with a predicate pushdown.
Predicate pushdown is an optimization that applies conditions (predicates) as early as possible - ideally preventing any loading of unneeded rows.
References:
https://modern-sql.com/feature/with/performance
NEW QUESTION: 3
以下の各ステートメントについて、ステートメントが真である場合は「はい」を選択します。それ以外の場合は、「いいえ」を選択します。
注:それぞれの正しい選択には1ポイントの価値があります。
Answer:
Explanation:
Explanation
References:
https://docs.microsoft.com/en-us/office365/securitycompliance/sensitivity-labels
NEW QUESTION: 4
The best use principles of NGFW include
A. Minimum authorization principle
B. Based on application control
C. Blacklist mode
D. Whitelist mode
Answer: A,B,D
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