1.計算每個tag下的商品數量

PUT /database/_mapping/product {"properties": {"tags": {"type": "text","fielddata": true}} } GET /database/product/_search {"aggs": {"group_by_tags": {"terms": { "field": "tags" }}} } GET /database/product/_search {"size": 0,"aggs": {"all_tags": {"terms": { "field": "tags" }}} }

?2.對名稱中包含圣劍的商品，計算每個tag下的商品數量

GET /database/product/_search {"size": 0,"query": {"match": {"name": "圣劍"}},"aggs": {"all_tags": {"terms": {"field": "tags"}}} }

3.先分組，再算每組的平均值，計算每個tag下的商品的平均價格

GET /database/product/_search {"size": 0,"aggs" : {"group_by_tags" : {"terms" : { "field" : "tags" },"aggs" : {"avg_price" : {"avg" : { "field" : "price" }}}}} }

4.計算每個tag下的商品的平均價格，并且按照平均價格降序排序

GET /database/product/_search {"size": 0,"aggs" : {"all_tags" : {"terms" : { "field" : "tags", "order": { "avg_price": "desc" } },"aggs" : {"avg_price" : {"avg" : { "field" : "price" }}}}} }

5.按照指定的價格范圍區間進行分組，然后在每組內再按照tag進行分組，最后再計算每組的平均價格

GET /database/product/_search {"size": 0,"aggs": {"group_by_price": {"range": {"field": "price","ranges": [{"from": 0,"to": 20},{"from": 20,"to": 40},{"from": 40,"to": 50}]},"aggs": {"group_by_tags": {"terms": {"field": "tags"},"aggs": {"average_price": {"avg": {"field": "price"}}}}}}} }

?

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