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Druid SQL join
Joins · Join operators. These are available using a join datasource in native queries, or using the JOIN operator in Druid SQL. · Query-time lookups, simple key- ...
If a join cannot be handled directly by a native join datasource as written, Druid SQL will insert subqueries to make it runnable. For example, foo INNER JOIN ...
2021年7月7日 — The join condition in an SQL join query must be an equality that tells Druid which columns in each of the two tables contain identical data so ...
2020年6月4日 — In Druid 0.18, joins are implemented with a broadcast hash-join algorithm. With this approach, multiple joins can be stacked on top of each ...
2020年4月30日 — 对于右侧的数据源, lookup , inline ,或者 query 数据源是允许的。 Druid SQL也支持Join了!其实本质上是SQL JOIN查询被转换为一个或几个包含原生查询 ...

其他用户还问了以下问题

What does this exactly mean ?"In Druid 0.18.1, joins are implemented with a broadcast hash-join algorithm. This means that all tables other than the ...
2019年10月23日 — Druid SQL supports semijoins through both the WHERE x IN (SELECT ...) syntax and traditional JOIN syntax. But it only supports one subquery ...
join — 在Druid SQL 中,它们驻留在 lookup schema中。它们会被预加载到所有服务器的内存中,因此可以快速访问它们。可以使用join运算符 将它们连接到常规表上 ...
2020年10月2日 — does druid does not support it? (even using nvl) my simple query is as follow: select * from A left join B on A.col = case when B.col is ...

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