Q:

How to insert a value into all cells under a column name

In my SQL table there is a column named IsApproved and it's all NULL. I want to turn them to 'TRUE'. I wrote this SQL statement but it didn't work : 
INSERT INTO [persondb].[dbo].[Person] (IsApproved) VALUES ('True') 

How can I make this work? Thanks.

A:

update the table with the true value
update table [persondb].[dbo].[Person] 
set IsApproved = 'True' where IsApproved is null 

