Primary key & Foreign key | Demo | SQL | Oracle | Tutorial - 9 | Tamil

Primary key
1. Define the Unique value in the table
2. Does not make link between table
3. Cannot have null value
4. Only one primary key per table
Foreign key
1. It is the column that references the column of another table
2. Make link between table
3. Can have null value
4. Several foreign key allowed
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Chapter:
0:00 Introduction
0:13 Primary key vs foreign key
1:25 Demo
2:01 Primary key table
5:19 Foreign key table
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[@firesprings2808]

Super bro , I'm waiting for more videos from sql

[@Micah_Tech]

Already the overall topic has been covered, and uploaded into playlist, please do check

[@gokulvirat2036]

Bro primary key dob Column okie but epdi insert la dob kudukama result la varuthu

[@Micah_Tech]

Sysdate - 8760
Ippadi kudukuratha date value ah eduthukum