DB BASIC DB ADMIN

 DB BASIC DB ADMIN

****UNION AND UNION ALL

SQL tutorial 68: Union and Union All SQL Set Operator In Oracle Database By RebellionRider

https://www.youtube.com/watch?v=mLo3PDRJ2kI 

Watched 

What is the difference between UNION and UNION All ( SQl server )?

https://www.youtube.com/watch?v=JZdtgPaPP_A

**** INVALID OBJECTS

Compilation & Recompilation of Invalid Objects in Oracle | Use of DBMS_UTILITY | Use of DBMS_DDL

https://www.youtube.com/watch?v=HOLWOzHiquc

Oracle Tutorial||onlinetraining||pl/sql|| Invalid Objects by Basha

https://www.youtube.com/watch?v=WZs1Mg61KCs

sql server could not find the stored procedure and Invalid object name

https://www.youtube.com/watch?v=BtOlFZVL4IY