我可以在 Oracle NoSQL 数据库中执行左连接吗?

时间:2021-06-28 15:58:10

标签: nosql oracle-nosql

我们使用带有几个表的固定架构数据模型。我们计划在这些表之间执行左外连接。 Oracle NoSQL 数据库是否支持这种联接?

使用两个表 A 和 B 的简单示例:

 Table A
 {"idA":2,"nameA":"a2"}
 {"idA":3,"nameA":"a3"}
 {"idA":1,"nameA":"a1"}

 Table B
 {"idA":2,"idB":2,"nameB":"b22"}
 {"idA":1,"idB":1,"nameB":"b11"}

 We would like to perform a simple Left Outer Join on tables A and B to get the     following desired result:

 {"a":{"idA":1,"nameA":"a1"},"b":{"idA":1,"idB":1,"nameB":"b11"}}
 {"a":{"idA":2,"nameA":"a2"},"b":{"idA":2,"idB":2,"nameB":"b22"}}
 {"a":{"idA":3,"nameA":"a3"},"b":null}   

有可能吗?请指教。

0 个答案:

没有答案
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