SQL Azure Column data append?

Is there a way to just append data to existing column data?

For example update the Data Column

Record # Date Data
1 4/8/2103 SomeTextData1

Modified to
Record # Date Data
1 4/8/2103 SomeTextData1,SomeTextData2

Can this be done without wriring the whole column?
I have a lot of data being stored in that column and am just adding a small amount of text every minute.