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NIITsql選擇題考試題庫
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選擇題:(每空2分共20分)
1、在MS SQL Server中,用來顯示數(shù)據(jù)庫信息的系統(tǒng)存儲過程是( )
A sp_ dbhelp
B sp_ db
C sp_ help
D sp_ helpdb
2、SQL語言中,刪除一個表的命令是( )
A DELETE
B DROP
C CLEAR
D REMORE
3、關(guān)系數(shù)據(jù)庫中,主鍵是(__)
A、為標(biāo)識表中唯一的實體
B、創(chuàng)建唯一的索引,允許空值
C、只允許以表中第一字段建立
D、允許有多個主鍵的
4、在Transact-SQL語法中,SELECT語句的完整語法較復(fù)雜,但至少包括的部分(1___),使用關(guān)鍵字(2___)可以把重復(fù)行屏蔽,將多個查詢結(jié)果返回一個結(jié)果集合的運算符是(3___),如果在SELECT語句中使用聚合函數(shù)時,一定在后面使用(4___)。
⑴ A、SELECT,INTO B、SELECT,F(xiàn)ROM
C、SELECT,GROUP D、僅SELECT
、 A、DISTINCT B、UNION
C、ALL C、TOP
、 A、JOIN B、UNION
C、INTO C、LIKE
⑷ A、GROUP BY B、COMPUTE BY
C、HAVING D、COMPUTE
5、語句DBCC SHRINKDATABASE (Sample, 25)中的25表示的意思是
A、25M
B、剩余占整個空間的25%
C、已用空間占整個空間的25%
D、以上都不對
6、你是一個保險公司的數(shù)據(jù)庫開發(fā)人員,公司的保單信息存儲在SQL Server 2000數(shù)據(jù)庫中,你使用以下腳本建立了一個名為Policy的表:
CREATE TABLE Policy
(
PolicyNumber int NOT NULL DEFAULT (0),
InsuredLastName char (30) NOT NULL,
InsuredFirstName char (20) NOT NULL,
InsuredBirthDate datetime NOT NULL,
PolicyDate datetime NOT NULL,
FaceAmount money NOT NULL,
CONSTRAINT PK_Policy PRIMARY KEY (PolicyNumber)
)
每次公司銷售出一份保單,Policy表中就增加一條記錄,并賦予其一個新的保單號,你將怎么做?
a.建立一個INSTEAD OF INSERT觸發(fā)器來產(chǎn)生一個新的保單號,并將這個保單號插入數(shù)據(jù)表中。
b.建立一個INSTEAD OF UPDATE觸發(fā)器來產(chǎn)生一個新的保單號,并將這個保單號插入數(shù)據(jù)表中。
c.建立一個AFTER UPDATE觸發(fā)器來產(chǎn)生一個新的保單號,并將這個保單號插入數(shù)據(jù)表中。
d.用AFTER UPDATE觸發(fā)器替代DEFAULT約束條件產(chǎn)生一個新的保單號,并將這個保單號插入數(shù)據(jù)表中。
7、在SQL語言中,如果要建立一個工資表包含職工號,姓名,職稱。工資等字段。若要保證工資字段的取值不低于800元,最合適的實現(xiàn)方法是:
A。在創(chuàng)建工資表時為”工資“字段建立缺省
B。在創(chuàng)建工資表時為”工資“字段建立檢查約束
C。在工資表建立一個觸發(fā)器
D。為工資表數(shù)據(jù)輸入編寫一個程序進行控制
8、Select 語句中用來連接字符串的符號是______.
A. “+” B. “&” C.“||” D.“|”
9、你是一個出版公司的數(shù)據(jù)庫開發(fā)人員,對特定的書名的每天的銷售情況建立了如下的存儲過程:
CREATE PROCEDURE get_sales_for_title
title varchar(80), @ytd_sales int OUTPUT
AS
SELECT @ytd_sales = ytd_sales
FROM titles
WHERE title = @title
IF @@ROWCOUNT = 0
RETURN(-1)
ELSE
RETURN(0)
另外建立了一個腳本執(zhí)行這個存儲過程,如果執(zhí)行成功,將返回對應(yīng)于書名的每天的銷售情況的報表,如果執(zhí)行失敗,將返回“No Sales Found”,怎樣建立這個腳本?
A. DECLARE @retval int
DECLARE @ytd int
EXEC get_sales_for_title ‘Net Etiquette’, @ytd
IF @retval < 0
PRINT ‘No sales found’
ELSE
PRINT ‘Year to date sales: ’ + STR (@ytd)
GO
B. DECLARE @retval int
DECLARE @ytd int
EXEC get_sales_for_title ‘Net Etiquette’, @ytd OUTPUT
IF @retval < 0
PRINT ‘No sales found’
ELSE
PRINT ‘Year to date sales: ’ + STR (@ytd)
GO
C. DECLARE @retval int
DECLARE @ytd int
EXEC get_sales_for_title ‘Net Etiquette’,@retval OUTPUT
IF @retval < 0
PRINT ‘No sales found’
ELSE
PRINT ‘Year to date sales: ’ + STR (@ytd)
GO
D. DECLARE @retval int
DECLARE @ytd int
EXEC @retval = get_sales_for_title ‘Net Etiquette’, @ytd OUTPUT
IF @retval < 0
PRINT ‘No sales found’
ELSE
PRINT ‘Year to date sales: ’ + STR (@ytd)
GO
10、You are a database developer for a container manufacturing company. The containers produced by your company are a number of different sizes and shapes. The tables that store the container information are shown in the Size, Container, and Shape Tables exhibit:
Size
SizeID
SizeName
Height
Container
ContainerID
ShapeID
SizeID
Shape
ShapeID
ShapeName
Measurements
A sample of the data stored in the tables is shown below:
Size Table
SizeID SizeName Height
1 Small 40
2 Medium 60
3 Large 80
4 Jumbo 100
Shape Table
ShapeID ShapeName Measurement
1 Triangle 10
2 Triangle 20
3 Triangle 30
4 Square 20
5 Square 30
6 Square 40
7 Circle 15
8 Circle 25
9 Circle 35
Periodically, the dimensions of the containers change. Frequently, the database users require the volume of a container. The volume of a container is calculated based on information in the shape and size tables.
You need to hide the details of the calculation so that the volume can be easily accessed in a SELECT query with the rest of the container information. What should you do?
A. Create a user-defined function that requires ContainerID as an argument and returns the volume of the container.
B. Create a stored procedure that requires ContainerID as an argument and returns the volume of the container.
C. Add a column named volume to the container table. Create a trigger that calculates and stores volume in this column when a new container is inserted into the table.
D. Add a computed column to the container table that calculates the volume of the container.
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