Cassandra(NoSQL数据库系统)怎么多表关联查询?
1条回答 默认 最新
- blackoon88 2022-04-20 17:09关注
官方建议如下(简单的来说就是你最好把表设计成无关联的宽表,不支持join):
Design Differences Between RDBMS and Cassandra
No joins
You cannot perform joins in Cassandra. If you have designed a data model and find that you need something like a join, you’ll have to either do the work on the client side, or create a denormalized second table that represents the join results for you. This latter option is preferred in Cassandra data modeling. Performing joins on the client should be a very rare case; you really want to duplicate (denormalize) the data instead.本回答被题主选为最佳回答 , 对您是否有帮助呢?解决 无用评论 打赏 举报
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