SQL基礎(chǔ)知識(shí)測(cè)試

1?.?SQL 指的是？

Strong Question Language

Structured Question Language

Structured Query Language

2?.?哪個(gè)SQL 語(yǔ)句用于從數(shù)據(jù)庫(kù)中提取數(shù)據(jù)？

EXTRACT

SELECT

OPEN

GET

3?.?哪條SQL 語(yǔ)句用于更新數(shù)據(jù)庫(kù)中的數(shù)據(jù)？

MODIFY

SAVE AS

UPDATE

SAVE

4?.?哪條SQL 語(yǔ)句用于刪除數(shù)據(jù)庫(kù)中的數(shù)據(jù)？

COLLAPSE

DELETE

REMOVE

5?.?哪條SQL 語(yǔ)句用于在數(shù)據(jù)庫(kù)中插入新的數(shù)據(jù)？

INSERT NEW

ADD RECORD

ADD NEW

INSERT INTO

6?.?通過(guò)SQL，您如何從 "Persons"表中選取 "FirstName" 列？

SELECT Persons.FirstName

SELECT FirstName FROM Persons

EXTRACT FirstName FROM Persons

7?.?通過(guò)SQL，您如何從 "Persons"表中選取所有的列？

SELECT [all] FROM Persons

SELECT Persons

SELECT * FROM Persons

SELECT *.Persons

8?.?通過(guò)SQL，您如何從 "Persons"表中選取 "FirstName" 列的值等于"Peter" 的所有記錄？

SELECT [all] FROM Persons WHEREFirstName='Peter'

SELECT * FROM Persons WHERE FirstName LIKE'Peter'

SELECT [all] FROM Persons WHERE FirstNameLIKE 'Peter'

SELECT * FROM Persons WHERE FirstName='Peter'

9?.?通過(guò)SQL，您如何從 "Persons"表中選取 "FirstName" 列的值以"a" 開(kāi)頭的所有記錄？

SELECT * FROM Persons WHERE FirstName LIKE 'a%'

SELECT * FROM Persons WHERE FirstName='a'

SELECT * FROM Persons WHERE FirstName LIKE'%a'

SELECT * FROM Persons WHERE FirstName='%a%'

10?.?請(qǐng)判斷下列說(shuō)法是否正確：當(dāng)所列出的某個(gè)條件為true 時(shí)，OR 運(yùn)算符會(huì)顯示記錄。當(dāng)列出的所有條件為true 時(shí)，AND 運(yùn)算符會(huì)顯示記錄。

正確

錯(cuò)誤

11?.?通過(guò)SQL，您如何在表 Persons 中選擇FirstName 等于 Thomas 而LastName 等于 Carter 的所有記錄？

SELECT * FROM Persons WHERE FirstName LIKE'Thomas' AND LastName LIKE 'Carter'

SELECT FirstName='Thomas',LastName='Carter' FROM Persons

SELECT * FROM Persons WHERE FirstName='Thomas' AND LastName='Carter'

12?.?通過(guò)SQL，您如何按字母順序選取 Persons表中 LastName 介于 Adams 和 Carter 的所有記錄？

SELECT * FROM Persons WHERE LastName BETWEEN 'Adams' AND'Carter'

SELECT * FROM Persons WHERELastName>'Adams' AND LastName

SELECT LastName>'Adams' AND LastName

13?.?哪條SQL 語(yǔ)句可返回唯一不同的值？

SELECT DIFFERENT

SELECT DISTINCT

SELECT UNIQUE

14?.?哪個(gè)SQL 關(guān)鍵詞用于對(duì)結(jié)果集進(jìn)行排序？

ORDER

SORT BY

SORT

ORDER BY

15?.?通過(guò)SQL，您如何根據(jù) "FirstName"列降序地從 "Persons" 表返回所有記錄？

SELECT * FROM Persons SORT 'FirstName' DESC

SELECT * FROM Persons ORDER BY FirstName DESC

SELECT * FROM Persons ORDER FirstName DESC

SELECT * FROM Persons SORT BY 'FirstName'DESC

16?.?通過(guò)SQL，您如何向 "Persons"表插入新的記錄？

INSERT ('Jimmy', 'Jackson') INTO Persons

INSERT VALUES ('Jimmy', 'Jackson') INTOPersons

INSERT INTO Persons VALUES ('Jimmy', 'Jackson')

17?.?通過(guò)SQL，您如何向 "Persons"表中的 "LastName" 列插入"Wilson" ？

INSERT INTO Persons (LastName) VALUES ('Wilson')

INSERT ('Wilson') INTO Persons (LastName)

INSERT INTO Persons ('Wilson') INTOLastName

18?.?您如何把"Persons" 表中 "LastName" 列的 "Gates"改為 "Wilson" ？

MODIFY Persons SET LastName='Wilson' WHERELastName='Gates'

UPDATE Persons SET LastName='Wilson' WHERE LastName='Gates'

UPDATE Persons SET LastName='Wilson' INTOLastName='Gates'

MODIFY Persons SET LastName='Wilson' INTOLastName='Gates'

19?.?通過(guò)SQL，您如何在 "Persons"表中刪除 "FirstName" 等于"Fred" 的紀(jì)錄？

DELETE FROM Persons WHERE FirstName = 'Fred'

DELETE FirstName='Fred' FROM Persons

DELETE ROW FirstName='Fred' FROM Persons

20?.?通過(guò)SQL，您如何返回 "Persons"表中記錄的數(shù)目？

SELECT COLUMNS() FROM Persons

SELECT COLUMNS(*) FROM Persons

SELECT COUNT() FROM Persons

SELECT COUNT(*) FROM Persons

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