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NEW QUESTION: 1
HOTSPOT
Answer:
Explanation:
NEW QUESTION: 2
Sie entwickeln eine Microsoft SQL Server-Datenbank. Die Datenbank enthält eine Tabelle mit dem Namen Status, die durch die folgende Transact-SQL-Anweisung definiert wird:
In der Statustabelle befinden sich Tausende von Zeilen, wobei die Daten in der Spalte "Farbe" erheblich dupliziert wurden.
Neunzig Prozent der Zeilen in der Tabelle haben Color = "Red" und die restlichen 10 Prozent haben Color = "Green".
Sie möchten die Farbinformationen in dieser Tabelle normalisieren. Sie erstellen eine Tabelle mit dem Namen Colors, die durch die folgende DDL definiert wird:
Sie füllen die neue Colors-Tabelle mit der folgenden Transact-SQL-Anweisung auf:
INSERT Colors (ColorName) SELECT DISTINCT Color FROM Status
Sie müssen sicherstellen, dass die folgenden Anforderungen erfüllt sind:
* In der Statustabelle werden nur Farben verwendet, die in der Farbtabelle vorhanden sind.
* Die Datenredundanz in der Statustabelle ist verringert.
* Die Datenintegrität wird während des Normalisierungsprozesses erzwungen.
Welche drei Transact-SQL-Segmente sollten Sie zur Entwicklung der Lösung verwenden? Verschieben Sie zum Beantworten das entsprechende Transact-SQL-Segment aus der Liste der Transact-SQL-Segmente in den Antwortbereich und ordnen Sie sie in der richtigen Reihenfolge an.
Answer:
Explanation:
Erläuterung
Aktualisieren Sie zuerst die neue Spalte ColorID und löschen Sie die alte Spaltenfarbe.
Fügen Sie der neuen ColorID-Spalte eine Prüfbedingung hinzu, und fügen Sie schließlich eine Fremdschlüsselbedingung hinzu.
NEW QUESTION: 3
You develop a Microsoft SQL Server 2012 database that contains tables named Employee and Person. The tables have the following definitions:
You create a view named VwEmployee as shown in the following Transact-SQL statement.
Users are able to use single INSERT statements or INSERT...SELECT statements into this view. You need to ensure that users are able to use a single statement to insert records into both Employee and Person tables by using the VwEmployee view.
Which Transact-SQL statement should you use?
A. CREATE TRIGGER TrgVwEmployee ON VwEmployee INSTEAD OF INSERT AS BEGIN INSERT INTO Person(Id, FirstName, LastName) SELECT Id, FirstName, LastName FROM VwEmployee INSERT INTO Employee(PersonID, EmployeeNumber) SELECT Id, EmployeeNumber FROM VwEmployee End
B. CREATE TRIGGER TrgVwEmployee ON VwEmployee FOR INSERT AS BEGIN INSERT INTO Person(Id, FirstName, LastName) SELECT Id, FirstName, LastName, FROM inserted INSERT INTO Employee(PersonId, EmployeeNumber) SELECT Id, EmployeeNumber FROM inserted END
C. CREATE TRIGGER TrgVwEmployee ON VwEmployee
INSTEAD OF INSERT
AS
BEGIN
DECLARE @ID INT, @FirstName NVARCHAR(25), @LastName NVARCHAR(25),
@PersonID INT,
@EmployeeNumber NVARCHAR(15)
SELECT @ID = ID, @FirstName = FirstName, @LastName = LastName,
@EmployeeNumber =
EmployeeNumber
FROM inserted
INSERT INTO Person(Id, FirstName, LastName)
VALUES(@ID, @FirstName, @LastName)
INSERT INTO Employee(PersonID, EmployeeNumber)
VALUES(@PersonID, @EmployeeNumber
End
D. CREATE TRIGGER TrgVwEmployee ON VwEmployee INSTEAD OF INSERT AS BEGIN INSERT INTO Person(Id, FirstName, LastName) SELECT Id, FirstName, LastName, FROM inserted INSERT INTO Employee(PersonId, EmployeeNumber) SELECT Id, EmployeeNumber FROM inserted END
Answer: D