This is the SQL wrapper for MongoDB for Erlang. It mimics interface and behavior of MySQL Native Erlang driver.
Download and compile MongoSQL and eMongo driver
$ git clone git://github.com/master/emongo.git emongo
$ git clone git://github.com/master/mongosql.git mongosql
$ cd emongo
$ make
$ cd ../mongosql
$ make
$ cd ..
$ erl -pa emongo/ebin mongosql/ebin
> application:start(emongo).
> {ok, Pool} = mongosql_conn:start([{"127.0.0.1", 27017}], "test1").
> mongosql_conn:fetch(Pool, "insert into tbl1 col1, col2 values ('string', 1);", false).
{updated,1}
> mongosql_conn:fetch(Pool, "select count(*) from tbl1;", false).
{selected,["count(*)"],[{"1"}]}
> mongosql_conn:fetch(Pool, "select * from tbl1;", false).
{selected,["col1","col2"],[["string",1]]}
> mongosql_conn:fetch(Pool, "delete from tbl1 where col2 = 1;", false).
{updated,1}
> mongosql_conn:fetch(Pool, "select count(*) from tbl1;", false).
{selected,["count(*)"],[{"0"}]}
> mongosql_conn:stop(Pool).