1. You can use the ElasticHQ automatic conversion module to convert SQL to DSL
2.match full-text search, correlation query, which is different from traditional data query either matching or not matching
3. filter performs a range query and reuses the previous match query
4.match_phrase exact match
5.highlight highlight
6.aggs aggregation is similar to SQL group by but more powerful, aggregation supports hierarchical aggregation
7. More features such as suggestions, geolocation, percolation, fuzzy and partial matching