Inline View In Oracle SQL

--=================== TABLE STRUCTURE =======================

XXSD_EMP_TL

EMPNO	ENAME	JOB	MGR	SAL	COMM	DEPTNO
7369	SMITH	CLERK	7902	800	80	20
7499	ALLEN	SALESMAN	7698	1600	300	30
7521	WARD	SALESMAN	7698	1250	500	30
7566	JONES	MANAGER	7839	2975	1200	20
7654	MARTIN	SALESMAN	7698	1250	1400	30
7698	BLAKE	MANAGER	7839	2850	1100	30
7782	CLARK	MANAGER	7839	2450	900	10
7788	SCOTT	ANALYST	7566	3000	750	20
7839	KING	PRESIDENT		5000	2000	10
7844	TURNER	SALESMAN	7698	1500	300	30
7876	ADAMS	CLERK	7788	1100	220	20
7900	JAMES	CLERK	7698	950	110	30
7902	FORD	ANALYST	7566	3000	700	20
7934	MILLER	CLERK	7782	1300	720	10

XXSD_DEPT_TL

DEPTNO	DNAME	LOC	DEPT_YEAR
10	ACCOUNTING	NEW YORK	2020
20	RESEARCH	DALLAS	2019
30	SALES	CHICAGO	2018
40	OPERATIONS	BOSTON	2017

--===================  In Line View========================

 select * from (  )

 CREATE OR REPLACE VIEW    XXSD_EMP_INFO_V AS

 select ENAME, JOB, MGR, A.DEPTNO, B.DNAME  from XXSD_EMP_TL A, XXSD_DEPT_TL B WHERE A.DEPTNO = B.DEPTNO

 select * from  XXSD_EMP_INFO_V

 --FROM--

 select * from ( )

 select * from ( select ENAME, JOB, MGR  from XXSD_EMP_TL ) --- SINGLE TABLE --- -- It Runs Only One Time—

ENAME	JOB	MGR
SMITH	CLERK	7902
ALLEN	SALESMAN	7698
WARD	SALESMAN	7698
JONES	MANAGER	7839
MARTIN	SALESMAN	7698
BLAKE	MANAGER	7839
CLARK	MANAGER	7839
SCOTT	ANALYST	7566
KING	PRESIDENT
TURNER	SALESMAN	7698
ADAMS	CLERK	7788
JAMES	CLERK	7698
FORD	ANALYST	7566
MILLER	CLERK	7782

 select * from ( select ENAME, JOB, MGR, A.DEPTNO, B.DNAME  from XXSD_EMP_TL A, XXSD_DEPT_TL B WHERE A.DEPTNO = B.DEPTNO  ) --- Multi TABLE --- -- It Runs Only One Time--

ENAME	JOB	MGR	DEPTNO	DNAME
SMITH	CLERK	7902	20	RESEARCH
ALLEN	SALESMAN	7698	30	SALES
WARD	SALESMAN	7698	30	SALES
JONES	MANAGER	7839	20	RESEARCH
MARTIN	SALESMAN	7698	30	SALES
BLAKE	MANAGER	7839	30	SALES
CLARK	MANAGER	7839	10	ACCOUNTING
SCOTT	ANALYST	7566	20	RESEARCH
KING	PRESIDENT		10	ACCOUNTING
TURNER	SALESMAN	7698	30	SALES
ADAMS	CLERK	7788	20	RESEARCH
JAMES	CLERK	7698	30	SALES
FORD	ANALYST	7566	20	RESEARCH
MILLER	CLERK	7782	10	ACCOUNTING

  

--====================================================

--  Join With Other Tables

--====================================================

 Inline View In Oracle SQL

--===============================================================================

select *

from ( select ENAME, JOB, MGR ,DEPTNO from XXSD_EMP_TL )   A, XXSD_DEPT_TL B

WHERE A.DEPTNO = B.DEPTNO

ENAME	JOB	MGR	DEPTNO	DEPTNO_1	DNAME	LOC	DEPT_YEAR
SMITH	CLERK	7902	20	20	RESEARCH	DALLAS	2019
ALLEN	SALESMAN	7698	30	30	SALES	CHICAGO	2018
WARD	SALESMAN	7698	30	30	SALES	CHICAGO	2018
JONES	MANAGER	7839	20	20	RESEARCH	DALLAS	2019
MARTIN	SALESMAN	7698	30	30	SALES	CHICAGO	2018
BLAKE	MANAGER	7839	30	30	SALES	CHICAGO	2018
CLARK	MANAGER	7839	10	10	ACCOUNTING	NEW YORK	2020
SCOTT	ANALYST	7566	20	20	RESEARCH	DALLAS	2019
KING	PRESIDENT		10	10	ACCOUNTING	NEW YORK	2020
TURNER	SALESMAN	7698	30	30	SALES	CHICAGO	2018
ADAMS	CLERK	7788	20	20	RESEARCH	DALLAS	2019
JAMES	CLERK	7698	30	30	SALES	CHICAGO	2018
FORD	ANALYST	7566	20	20	RESEARCH	DALLAS	2019
MILLER	CLERK	7782	10	10	ACCOUNTING	NEW YORK	2020