I answer a lot of SQL question on Stack Overflow. I am often trying to determine what dialects a question is referring to. I also try to suggest solutions to standard SQL questions that may have easier solutions via a specific dialect. I am looking for a one-stop feature reference guide or site that I can search for all dialects. For example if I search for “TOP” I would like to get back sql-server, MS Access, Virtuoso, SAP HANA. I would also like a list of dialects that support the feature using a different keyword such as LIMIT in SAP HANA, MySQL, or PostgreSQL. And ROWNUM in Oracle.