In-Line Queries Assignment Help

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In-Line Queries

Inline Queries are a type of queries that can be selected from the ‘FROM’ clause of the select statement.

Example

SELECT ENAME,DEPTNO FROM (SELECT * FROM EMP) WHERE DEPTNO=20;
The output would be:

ENAME    DEPTNO

JONES         20
FORD          20
SMITH         20
SCOTT        20
ADAMS       20

The subsequent query displays the average salary of the employees along with their salary. SELECT ENAME,SAL, X “AVERAGE SALARY” ,DEPTNO FROM (SELECT AVG(SAL) X,DEPTNO B FROM EMP
GROUP BY DEPTNO),EMP WHERE DEPTNO=B;

The output would be:

ENAME      SAL    Average Salary    DEPTNO
KING         5000        2916.6667          10
CLARK       2450        2916.6667          10
MILLER      1300        2916.6667          10
JONES       2975        2175                  20
SCOTT      3000        2175                  20
ADAMS     1100        2175                  20
SMITH       800        2175                   20
FORD        3000        2175                 20
BLAKE      2850        1566.6667         30
MARTIN    1250        1566.6667         30
ALLEN      1600         1566.6667         30
TURNER   1500      1566.6667            30
JAMES      950        1566.6667            30
WARD      1250        1566.6667          30

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