I have a complex business logic that requires me to perform a 2-levels nested query. The queries are generated by Django's ORM. At the bottom of the question I'll provide the queries as-is as well as a full EXPLAIN suitable to be viewed with PEV2, but in o...

我有一个名为“ doctor_tbl”的表，其中包含以下列： doctor_id pid owner_name companyname fleet_group vehicle_number driver_name 59 NULL PTS Owner PTS 3 NULL NULL 60 NULL ABT Mahalingam ABT...

我有一个嵌套的数据类型，我想在它们的内部对象中进行计算，我基本上希望我的搜索在两个文档中满足条件时返回命中值，棘手的条件是在不知道其时间戳的情况下计算它们之间的时差实际值，只是它们之间的差异。 以以下单个文档为例： { "messages": [ [ { "message": "First message", "timeStamp": "0:00:00" }, { "message": "Second messa...