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NIITsql選擇題考試題庫(kù)

時(shí)間:2022-05-13 02:26:51 NIIT認(rèn)證 我要投稿
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NIITsql選擇題考試題庫(kù)

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NIITsql選擇題考試題庫(kù)

  選擇題:(每空2分共20分)

  1、在MS SQL Server中,用來(lái)顯示數(shù)據(jù)庫(kù)信息的系統(tǒng)存儲(chǔ)過(guò)程是( )

  A sp_ dbhelp

  B sp_ db

  C sp_ help

  D sp_ helpdb

  2、SQL語(yǔ)言中,刪除一個(gè)表的命令是( )

  A DELETE

  B DROP

  C CLEAR

  D REMORE

  3、關(guān)系數(shù)據(jù)庫(kù)中,主鍵是(__)

  A、為標(biāo)識(shí)表中唯一的實(shí)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(gè)主鍵的

  4、在Transact-SQL語(yǔ)法中,SELECT語(yǔ)句的完整語(yǔ)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(gè)查詢(xún)結(jié)果返回一個(gè)結(jié)果集合的運(yùn)算符是(3___),如果在SELECT語(yǔ)句中使用聚合函數(shù)時(shí),一定在后面使用(4___)。

 、 A、SELECT,INTO B、SELECT,F(xiàn)ROM

  C、SELECT,GROUP D、僅SELECT

  ⑵ A、DISTINCT B、UNION

  C、ALL C、TOP

 、 A、JOIN B、UNION

  C、INTO C、LIKE

 、 A、GROUP BY B、COMPUTE BY

  C、HAVING D、COMPUTE

  5、語(yǔ)句DBCC SHRINKDATABASE (Sample, 25)中的25表示的意思是

  A、25M

  B、剩余占整個(gè)空間的25%

  C、已用空間占整個(gè)空間的25%

  D、以上都不對(duì)

  6、你是一個(gè)保險(xiǎn)公司的數(shù)據(jù)庫(kù)開(kāi)發(fā)人員,公司的保單信息存儲(chǔ)在SQL Server 2000數(shù)據(jù)庫(kù)中,你使用以下腳本建立了一個(gè)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(xiāo)售出一份保單,Policy表中就增加一條記錄,并賦予其一個(gè)新的保單號(hào),你將怎么做?

  a.建立一個(gè)INSTEAD OF INSERT觸發(fā)器來(lái)產(chǎn)生一個(gè)新的保單號(hào),并將這個(gè)保單號(hào)插入數(shù)據(jù)表中。

  b.建立一個(gè)INSTEAD OF UPDATE觸發(fā)器來(lái)產(chǎn)生一個(gè)新的保單號(hào),并將這個(gè)保單號(hào)插入數(shù)據(jù)表中。

  c.建立一個(gè)AFTER UPDATE觸發(fā)器來(lái)產(chǎn)生一個(gè)新的保單號(hào),并將這個(gè)保單號(hào)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(gè)新的保單號(hào),并將這個(gè)保單號(hào)插入數(shù)據(jù)表中。

  7、在SQL語(yǔ)言中,如果要建立一個(gè)工資表包含職工號(hào),姓名,職稱(chēng)。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(shí)現(xiàn)方法是:

  A。在創(chuàng)建工資表時(shí)為”工資“字段建立缺省

  B。在創(chuàng)建工資表時(shí)為”工資“字段建立檢查約束

  C。在工資表建立一個(gè)觸發(fā)器

  D。為工資表數(shù)據(jù)輸入編寫(xiě)一個(gè)程序進(jìn)行控制

  8、Select 語(yǔ)句中用來(lái)連接字符串的符號(hào)是______.

  A. “+” B. “&” C.“||” D.“|”

  9、你是一個(gè)出版公司的數(shù)據(jù)庫(kù)開(kāi)發(fā)人員,對(duì)特定的書(shū)名的每天的銷(xiāo)售情況建立了如下的存儲(chǔ)過(guò)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(gè)腳本執(zhí)行這個(gè)存儲(chǔ)過(guò)程,如果執(zhí)行成功,將返回對(duì)應(yīng)于書(shū)名的每天的銷(xiāo)售情況的報(bào)表,如果執(zhí)行失敗,將返回“No Sales Found”,怎樣建立這個(gè)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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