There is also N1QL (https://docs.couchbase.com/server/current/getting-started/try-a-query.html https://docs.couchbase.com/server/current/getting-started/tr...)

There is also N1QL (https://docs.couchbase.com/server/current/getting-started/try-a-query.html https://docs.couchbase.com/server/current/getting-started/tr...) that lets you query JSON documents while using familiar SQL commands. It also supports ACID transactions (https://docs.couchbase.com/server/current/n1ql/n1ql-language-reference/transactions.html https://docs.couchbase.com/server/current/n1ql/n1ql-language...) (disclaimer: I work for Couchbase, the creator of N1QL)