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熟悉傳統數據庫概念及 SQL
1. Which of the following is not a many-to-many relationship?
A.
Customer and Restaurant
B.
Student and Teacher
C.
Patient and Doctor
D.
Husband and wife
2. Which of the following may be a valid SQL statement?
A.
select students if name='paul' && age>20;
B.
select * from students where name='paul' and age>20;
C.
choose name, id from students if name='paul' && age>20;
D.
get students where name='paul' and age>20;
3. Which of the following is a collection of data items organized as a set of formally described tables from which data can be accessed or reassembled in many different ways, without having to reorganize the table?
A.
Array
B.
Splay Tree
C.
Relational Database
D.
Venn Diagram
4. Each record in the products table has a product ID and a product name. How to list the products sorted by their names?
A.
select * from products order by name
B.
sort products by name
C.
select from products sorted by name
D.
select products by name
5. In most databases, data are organized and stored in:
A.
view
B.
table
C.
directory
D.
plain text
6. Which of the following SQL statements is the correct one to copy rows from another tables?
A.
Insert into sales(item_id,name,price)select order_id,name,price from orders;
B.
Insert into sales(item_id,name,price)on select order_id,mane ,price from orders;
C.
Insert into sales(item_id,name,price)values (Select order_id,name,price from orders);
D.
Insert into sales(item_id,name,price)as select order_id,name,price from order;
7. Typically where is a database is stored?
A.
In memory.
B.
In the CPU.
C.
On a Hard disk.
D.
On a CDROM.
8. Which of the following is the best description for a database?
A.
A database directly contains some tables.
B.
A database directly contains some records.
C.
A database directly contains some columns.
D.
A database directly contains some rows.
9. Which of the following is a standard interactive and programming language for getting information from and updating a database?
A.
Dynamic Query Language (DQL)
B.
National Query Language (NQL)
C.
JAVA
D.
Structured Query Language (SQL)
10. Which of the following is suitable to use index?
A.
Columns often be used in ORDER BY clause
B.
Many duplicate rows
C.
Table with few rows
D.
Table with many modifications but few actual queries