What is primary key in database?
By Arsal Ahmed Posted on March-20-2018
What is primary key in database?
A primary key is a special relational database column or combinations of columns designed to uniquely identify all the table records.
- It must contain a unique value for each row of data
- It cannot contain null values.
- The primary key is inserted in the first column in which it is inserted with the name that had an ID name in column.
- The null value will not show in the column of table.
A primary key is a special relational database column or combinations of columns designed to uniquely identify all the table records.
- It must contain a unique value for each row of data
- It cannot contain null values.
- The primary key is inserted in the first column in which it is inserted with the name that had an ID name in column.
- The null value will not show in the column of table.
By Arsal Ahmed 20-Mar-2018
Share This with your friend by choosing any social account
You may also read following recent articles
|
Is Chat GPT Use Of Web Content Fair!
Junaid A 29-Jan-2023 |
|
|
Office politics examples!
Junaid A 28-Jan-2023 |
|
|
ten jokes about the status of ChatGPT!
Junaid A 17-Jan-2023 |
|
|
Image Resizing On Uploadig!
shahid Riaz 02-Jan-2019 |
|
|
Hosting Server Connect Timeout!
Junaid A 13-Apr-2018 |
|
|
What I can do after BS!
12-Apr-2018 |
|
|
Best hosting for windows!
05-Apr-2018 |
|
|
Why cv is rejected!
30-Mar-2018 |
|
|
How to Integrated The Theme in Project!
shaheer 27-Mar-2018 |
|
|
How to perform crud operations in asp.net?!
27-Mar-2018 |
|
|
How to perform crud operations in asp.net?!
27-Mar-2018 |
|
|
What is outer join in database?!
Arsal Ahmed 20-Mar-2018 |
|
|
What is right join in database?!
Arsal Ahmed 20-Mar-2018 |