I am looking for some online service like - SQL Fiddle - http://sqlfiddle.com but with better features. SQL Fiddle limits the database size to a small sample and does not have any proper user features to manage the fiddles systematically "like having a method of proper tags or comments about each fiddle etc."

It should allow me to quickly create a demo database online and then experiment with various queries on it. I did some searching online and found that there are quite a lot of such services available, like -

http://www.hongkiat.com/blog/tools-to-coding-online/
http://techslides.com/30-code-playgrounds-and-sharing-tools

But it is not possible for me to manually tryout all of them. So I was looking for some tried and tested solution, which is already being used by a lot of users here.

Please suggest the best options in this regards, from your own experience.

Thanks a lot

Need to go for express/free evaluation editions of sql server. 

https://www.microsoft.com/en-in/download/details.aspx?id=29066

Hi happy1001,

In addition to other post, please note that SQL Server Envaluation edition has 180 days' time limit.

Besides, you can download SQL Server 2014 Express from the following link. And please note that SQL Server 2014 Express edition has some limitations, for example: only one CPU can be used by the express edition, the maximum size of a database is 10 GB, it can only use up to 1GB of RAM.

http://www.microsoft.com/en-us/download/details.aspx?id=42299

Thanks,
Lydia Zhang