How to add a column and modify its data?
How to add a column and modify its data?
163
30-Jul-2023
Updated on 31-Jul-2023
Aryan Kumar
31-Jul-2023Sure, here is how to add a column and modify its data in SQL:
SQL
For example, to add a column called
Country
to theCustomers
table and modify its data, you would use the following code:SQL
This code will first add a column called
Country
to theCustomers
table. TheCountry
column will be aVARCHAR
with a maximum length of 255 characters.The second part of the code will update the
Country
column for all rows where theCountry
column is null. TheCountry
column will be set toUnited States
for all rows where theCountry
column is null.To run the code, you can copy and paste it into a SQL query tool, such as SQL Server Management Studio or MySQL Workbench.