Submit an issue to the issue tracker, and we'll help you.
How should I connect to MS SQL Server?
There is a tutorial covering frequent problems with SQL Server connection.
We explicitly support MS SQL Server from 10.50 2008 R2. If you have an earlier version, please go to Options tab in data source settings and choose Introspect using JDBC metadata.
MySQL shows NULL instead of '0000-00-00 00:00:00' in datetime field. Why?
It is the driver option we changed in DataGrip by default. You can configure it the way you like: