问题
Question: In order to store logos in a database and display them dynamically in ms-reporting service, I need to base64 encode the image. It doesn't work with binary saved images, due to MS limitations...
Now my question: Which datatype do I use? Varchar, nvarchar or text?
I guess varchar would be good enough, since base64 encoded, but images might be larger than 4000 characters...
回答1:
Varchar(max) supports up to 2GB, and since the data is already base64 encoded, unicode storage won't be required.
http://www.sqlskills.com/BLOGS/PAUL/post/Importance-of-choosing-the-right-LOB-storage-technique.aspx
来源：https://stackoverflow.com/questions/3363421/which-datatype-for-base64-encoded-image