Identify the capabilities of SELECT statement.
Projection
Selection
Data Control
Transaction
Determine the capability of the SELECT statement demonstrated in the given query.
SELECT e.ename, d.dname FROM emp e, dept d WHERE e.deptno = d.deptno AND e.sal > 1000;
Filtering
Joining
Which of the following clause is used to suppress duplicates in a SELECT statement?
INTERSECT
DUPLICATE
DISTINCT
UNIQUE
Chose the statements which correctly specify a rule to write a SQL statement
SQL statements are case sensitive
Keywords can be abbreviated to build a standard
SQL statements are case in-sensitive
clauses must be placed together
Determine the output of the below query
SELECT '5+7' FROM dual;
12
5+7
5
7
Write a query to display employee details (Name, Department, Salary and Job) from EMP table
SELECT ename, deptno, sal, job FROM emp;
SELECT * FROM emp;
SELECT DISTINCT ename, deptno, sal, job FROM emp;
SELECT ename, deptno, sal FROM emp;
Which of the below queries displays employees' name and new salary after the increment of 1000?
SELECT ename, sal FROM emp;
SELECT ename, sal=sal+1000 FROM emp;
SELECT ename, sal+1000 FROM emp;
SELECT ename, 1000 FROM emp;
SELECT 36/2-5*10 FROM dual;
130
-32
-120
175
SELECT (100-25)/15*(20-3) FROM dual;
0.294
-85
63.67
85
Chose the statements which correctly define a NULL value.
NULL is a special value with zero bytes
NULL is no value or unknown value
NULL is represented by a blank space
NULL is not same as zero
SELECT sal + NULL FROM emp WHERE empno = 7369;
sal + NULL
NULL
0
1250
Which of the below statements define column alias correctly?
A column alias renames a column heading
A column alias is an alternate column in a table
A column alias can be specified during table definition
A column alias immediately follows the column or expression in the SELECT statement
Specify the column alias NEWSAL for the expression containing salary in the below SQL query
SELECT ename, job, sal + 100 FROM emp;
(sal + 100) AS NEWSAL
(sal + 100) NEWSAL
(sal + 100) IS NEWSAL
sal + 100 IS NEWSAL
Specify the column alias "New Salary" for the expression containing salary in the below SQL query
(sal + 100) AS New Salary
(sal + 100) "New Salary"
(sal + 100) IS New Salary .
sal + 100 as "New Salary"
Which command is used to display the structure of a table?
LIST
SHOW
DESCRIBE
STRUCTURE
Predict the output when below statement is executed in SQL* Plus?
DESC emp
Raises error "SP2-0042: unknown command "desc emp" - rest of line ignored."
Lists the columns of EMP table
Lists the EMP table columns, their data type and nullity
Lists the columns of EMP table along with their data types
Which of the below statements are true about the DESCRIBE command?
It can be used in SQL*Plus only
It can be used in both SQL*Plus as well as SQL Developer
It doesn't works for object tables
It doesn't works for SYS owned tables
Which of the below alphanumeric characters are used to signify concatenation operator in SQL?
+
||
-
::
Which of the below statements are correct about the usage of concatenation operator in SQL?
It creates a virtual column in the table
It generates a character expression as the result of concatenation of one or more strings
It creates a link between two character columns
It can be used to concatenate date expressions with other column
Predict the output of the below query
SELECT ename || NULL FROM emp WHERE empno = 7369
SMITH
SMITH NULL
SMITHNULL
ORA-00904: "NULL": invalid identifier
SELECT 50 || 0001 FROM dual
500001
51
501
5001
You execute the below query
SELECT e.ename||' departments's name is:'|| d.dname FROM emp e, dept d where e.deptno=d.deptno;
And get the exception - ORA-01756: quoted string not properly terminated. Which of the following solutions can permanently resolve the problem?
Use double quote marks for the literal character string
Use [q] operator to enquote the literal character string and selecting the delimiter of choice
Remove the single quote mark (apostrophe) from the literal character string
Use another delimiter to bypass the single quote apostrophe in the literal string
Which of the below SELECT statement shows the correct usage of [q] operator?
SELECT e.ename || q'[department's name is]'|| d.dname FROM emp e, dept d WHERE e.deptno = d.deptno;
SELECT e.ename || q['department's name is']|| d.dname FROM emp e, dept d WHERE e.deptno = d.deptno;
SELECT e.ename || q[department's name is]|| d.dname FROM emp e, dept d WHERE e.deptno = d.deptno;
SELECT e.ename || q'(department's name is)'|| d.dname FROM emp e, dept d WHERE e.deptno = d.deptno;
Which of the below SELECT statement is used to select all columns of EMP table?
SELECT ALL FROM emp
SELECT # FROM emp
SELECT * FROM emp
ELECT empno,ename,deptno,sal,job,mgr,hiredate FROM emp
Which of the below SQL query will display employee names, department, and annual salary?
SELECT ename, deptno, sal + comm FROM emp;
SELECT ename, deptno, (sal * 12) Annual_Sal FROM emp;
Annual salary cannot be queried since the column doesn't exists in the table
