Tag: databases

Questions Related to databases

Multiple choice technology databases

Select employee name whose job is 'Manager' or 'Clerk' and Salary greater than 1000 and comm >100 and deptno is either 10 or 20

Select ename from emp where job in ('MANAGER','CLERK') AND SAL>1000 AND COMM>100 AND DEPTNO=(10,20);
Select ename from emp where job in ('MANAGER' OR 'CLERK') AND SAL>1000 AND COMM>100 AND DEPTNO IN (10,20);
Select ename from emp where job in ('MANAGER','CLERK') AND SAL>1000 AND COMM>100 AND DEPTNO IN (10,20);
None

Reveal answer Fill a bubble to check yourself

Multiple choice technology databases

What is the Output of the Following Program: declare n number:=2000; cursor c1 is select sal into n from emp where empno=7788; begin dbms_output.put_line(n); end; Data in Emp Table empno sal 123 1000

Null
It Gives Error
1000
2000

Reveal answer Fill a bubble to check yourself

Multiple choice technology databases

What is the output of the Query: select * from emp where dept_no in (select dept_no from dept order by dept_no desc);

It Executes Successfully
It throws Error with message: missing right Parenthesis
It throws Error
None

Reveal answer Fill a bubble to check yourself

Multiple choice technology databases

The life cycle of the explicit cursor goes through _______ stages:

Declare, Open, Close
Declare, Open, Fetch, Close
Declare, Open, Fetch, Close, Remove
None

Reveal answer Fill a bubble to check yourself

Multiple choice technology databases

Which is a Valid table name:

emp@_tab
emp#_tab
$emp_tab
Emp_delete

Reveal answer Fill a bubble to check yourself

Multiple choice technology databases

Select employee name whose job is 'Manager' or 'Clerk', Salary greater than 1000, comm >100 and deptno is either 10 or 20

Select ename from emp where job in ('MANAGER','CLERK') AND SAL>1000 AND COMM>100 AND DEPTNO=(10,20);
Select ename from emp where job in ('MANAGER' OR 'CLERK') AND SAL>1000 AND COMM>100 AND DEPTNO IN (10,20);
Select ename from emp where job in ('MANAGER','CLERK') AND SAL>1000 AND COMM>100 AND DEPTNO IN (10,20);
None

Reveal answer Fill a bubble to check yourself

Multiple choice technology databases

What is the Output of the Following Program: declare n number := 2000; cursor c1 is select sal into n from emp where empno = 7788; begin dbms_output.put_line(n); end; Data in Emp Table empno sal 123 1000

Null
It Throws Error
1000
2000

Reveal answer Fill a bubble to check yourself

Multiple choice technology databases

The below query Executes Successfully without Error: select * from emp where dept_no in (select dept_no from dept order by dept_no desc);

True
False

Reveal answer Fill a bubble to check yourself

Multiple choice technology databases

What happens if we execute the below create table query at first time in a database with other than sys user and the user is having create table privileges: create table dual(a number);

It throws error with message: table or view already exists
Insufficient privileges
Table will get created successfully
None

Reveal answer Fill a bubble to check yourself

Multiple choice technology databases

What is the output of the below queries: if table A is having 16 rows: select count() from A where 10=10; select count() from A having 10=10;

first gives error, 16
16, second gives error
16,16
Both the queries will give error

Reveal answer Fill a bubble to check yourself

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