一、题目及答案
1 . SQL 指的是?
- Strong Question Language
- Structured Question Language
- Structured Query Language
2 . 哪个 SQL 语句用于从数据库中提取数据?
- EXTRACT
- SELECT
- OPEN
- GET
3 . 哪条 SQL 语句用于更新数据库中的数据?
- MODIFY
- SAVE AS
- UPDATE
- SAVE
4 . 哪条 SQL 语句用于删除数据库中的数据?
- COLLAPSE
- DELETE
- REMOVE
5 . 哪条 SQL 语句用于在数据库中插入新的数据?
- INSERT NEW
- ADD RECORD
- ADD NEW
- INSERT INTO
6 . 通过 SQL,您如何从 "Persons" 表中选取 "FirstName" 列?
- SELECT Persons.FirstName
- SELECT FirstName FROM Persons
- EXTRACT FirstName FROM Persons
7 . 通过 SQL,您如何从 "Persons" 表中选取所有的列?
- SELECT [all] FROM Persons
- SELECT Persons
- SELECT * FROM Persons
- SELECT *.Persons
8 . 通过 SQL,您如何从 "Persons" 表中选取 "FirstName" 列的值等于"Peter" 的所有记录?
- SELECT [all] FROM Persons WHERE FirstName='Peter'
- SELECT * FROM Persons WHERE FirstName LIKE 'Peter'
- SELECT [all] FROM Persons WHERE FirstName LIKE 'Peter'
- SELECT * FROM Persons WHERE FirstName='Peter'
9 . 通过 SQL,您如何从 "Persons" 表中选取 "FirstName" 列的值以 "a" 开头的所有记录?
- 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 . 请判断下列说法是否正确:当所列出的某个条件为 true 时,OR 运算符会显示记录。当列出的所有条件为 true 时,AND 运算符会显示记录。
- 正确
- 错误
11 . 通过 SQL,您如何在表 Persons 中选择 FirstName 等于 Thomas 而 LastName 等于 Carter 的所有记录?
- 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 . 通过 SQL,您如何按字母顺序选取 Persons 表中 LastName 介于 Adams 和 Carter 的所有记录?
- SELECT * FROM Persons WHERE LastName BETWEEN 'Adams' AND 'Carter'
- SELECT * FROM Persons WHERE LastName>'Adams' AND LastName<'Carter'
- SELECT LastName>'Adams' AND LastName<'Carter' FROM Persons
13 . 哪条 SQL 语句可返回唯一不同的值?
- SELECT DIFFERENT
- SELECT DISTINCT
- SELECT UNIQUE
14 . 哪个 SQL 关键词用于对结果集进行排序?
- ORDER
- SORT BY
- SORT
- ORDER BY
15 . 通过 SQL,您如何根据 "FirstName" 列降序地从 "Persons" 表返回所有记录?
- 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 . 通过 SQL,您如何向 "Persons" 表插入新的记录?
- INSERT ('Jimmy', 'Jackson') INTO Persons
- INSERT VALUES ('Jimmy', 'Jackson') INTO Persons
- INSERT INTO Persons VALUES ('Jimmy', 'Jackson') √
17 . 通过 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') INTO LastName
18 . 您如何把 "Persons" 表中 "LastName" 列的 "Gates" 改为 "Wilson" ?
- MODIFY Persons SET LastName='Wilson' WHERE LastName='Gates'
- UPDATE Persons SET LastName='Wilson' WHERE LastName='Gates'
- UPDATE Persons SET LastName='Wilson' INTO LastName='Gates'
- MODIFY Persons SET LastName='Wilson' INTO LastName='Gates'
19 . 通过 SQL,您如何在 "Persons" 表中删除 "FirstName" 等于 "Fred" 的纪录?
- DELETE FROM Persons WHERE FirstName = 'Fred'
- DELETE FirstName='Fred' FROM Persons
- DELETE ROW FirstName='Fred' FROM Persons
20 . 通过 SQL,您如何返回 "Persons" 表中记录的数目?
- SELECT COLUMNS() FROM Persons
- SELECT COLUMNS(*) FROM Persons
- SELECT COUNT() FROM Persons
- SELECT COUNT(*) FROM Persons
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