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神州數(shù)碼筆試真題

時(shí)間:2024-08-26 17:55:34 學(xué)人智庫(kù) 我要投稿
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神州數(shù)碼筆試真題

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神州數(shù)碼筆試真題

  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 語(yǔ)句中用來(lái)連接字符串的符號(hào)是___C___。

  A。 “+” B。 “&” C!皘|” D!皘”

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