神州数码笔试题目选择部分分享

神州数码笔试题目分享：

选择题：

1)Which statement shows the maximum salary paid in each job category of each department_______

A。 select dept_id， job_cat，max(salary) from employees where salary > max(salary);

B。 select dept_id， job_cat，max(salary) from employees group by dept_id，job_cat;

C。 select dept_id， job_cat，max(salary) from employees;

D。 select dept_id， job_cat，max(salary) from employees group by dept_id;

E。 select dept_id， job_cat，max(salary) from employees group by dept_id，job_cat，salary;

2)description of the students table:

sid_id number

start_date date

end_date date

which two function are valid on the start_date column_________。

A。 sum(start_date)

B。 avg(start_date)

C。 count(start_date)

D。 avg(start_date，end_date)

E。 min(start_date)

F。 maximum(start_date)

3)for which two constraints does the oracle server implicitly create a unique index______。

A。 not null

B。 primary

C。 foreign key

D。 check

E。 unique

4)in a select statement that includes a where clause，where is the group by clause placed in the select statement______。

A。 immediately after the select clause

B。 before the where clause

C。 before the from clause

D。 after the order by clause

E。 after the where clause

5)in a select statement that includes a where clause，where is the order by clause placed in the select statement______。

A。immediately after the select clause

B。before the where clause

C。after all clause

D。after the where clause

E。before the from clause

6)evaluate there two sql statements______。

Select last_name，salary from employees order by salary;

Select last_name，salary from employees order by 2 asc;

A。the same result B。different result C。the second statement returns a syntax error

7) you would like to display the system date in the format“20051110 14：44：17”。Which select statement should you use______。

A。 select to_date(sydate，’yearmmdd hh:mm:ss’)from dual;

B。 select to_char(sydate，’yearmonthday hh:mi:ss’)from dual;

C。 select to_date(sydate，’yyyymmdd hh24:mi:ss’)from dual;

D。 select to_char(sydate，’yyyymmdd hh24:mi:ss’)from dual;

E。 select to_char(sydate，’yy-mm-dd hh24:mi:ss’)from dual;

8)which select statement will the result ‘ello world’from the string‘Hello world’______。

A。 select substr(‘Hello World’，1)from dual;

B。 select substr(trim(‘Hello World’，1，1))from dual;

C。 select lower(substr(‘Hello World’，1))from dual;

D。 select lower(trim(‘H’from‘Hello World’))from dual;

9)which are DML statements(choose all that apply)______。

Amit B。merge C。update D。delete E。creat F。drop

10)Select 语句中用来连接字符串的符号是___C___。

A。 “+” B。 “&” C。“||” D。“|”