- Trending Categories
Data Structure
Networking
RDBMS
Operating System
Java
MS Excel
iOS
HTML
CSS
Android
Python
C Programming
C++
C#
MongoDB
MySQL
Javascript
PHP
Physics
Chemistry
Biology
Mathematics
English
Economics
Psychology
Social Studies
Fashion Studies
Legal Studies
- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who
How can we alter table to add MySQL stored GENERATED COLUMNS?
For adding MySQL stored GENERATED COLUMNS in a table, we can use the same syntax as adding a column just adding “AS(expression)” after the data type. Its syntax would be as follows −
Syntax
ALTER TABLE table_name ADD COLUMN column_name AS(expression)STORED;
Example
mysql> ALTER TABLE employee_data_stored ADD COLUMN FULLName Varchar(200) AS (CONCAT_WS(" ", 'First_name','Last_name')) STORED;
Query OK, 2 rows affected (1.23 sec)
Records: 2 Duplicates: 0 Warnings: 0
mysql> Describe employee_data_stored;
+------------+--------------+------+-----+---------+------------------+
| Field | Type | Null | Key | Default | Extra |
+------------+--------------+------+-----+---------+------------------+
| ID | int(11) | NO | PRI | NULL | auto_increment |
| First_name | varchar(50) | NO | | NULL | |
| Last_name | varchar(50) | NO | | NULL | |
| FULL_NAME | varchar(90) | YES | | NULL | STORED GENERATED |
| FULLName | varchar(200) | YES | | NULL | STORED GENERATED |
+------------+--------------+------+-----+---------+------------------+
5 rows in set (0.00 sec)
Updated on: 2020-06-22T14:35:06+05:30
220 Views
Advertisements