原文链接:https://aws.amazon.com/cn/blogs/big-data/get-started-with-amazon-redshift-cross-database-queries-preview/ Amazon Redshift是一套快速、可扩展且安全的全托管云数据仓库,能够以简单、经济、高效的方式,使用标准SQL以及现有ETL、商务智能(BI)和报告工具对你的数据进行分析。每一天,成千上万的客...
With cross-database queries, you can do the following: Query data across databases in your Amazon Redshift cluster. Not only can you query from databases that you are connected to, you can also read from any other databases that you have permissions to. ...
Tutorial: Querying nested data with Amazon Redshift Spectrum Nested data use cases Nested data limitations (preview) Serializing complex nested JSON HyperLogLog sketches Considerations Limitations Examples Cross-database queries Considerations Limitations Examples Using cross-database queries with the query edit...
I did an experiment querying on a ra3 cluster using redshift query editor. I ran the following snippet while connected to cluster_b and got the same "perm tables" error. SELECT * FROM cluster_a.information_schema.tables This may be a redshift limitation with cross-database querying ...
交叉连接(CROSS JOIN)是一种连接操作,它返回两个表的笛卡尔积,即每个表中的每一行与另一个表中的每一行组合。以下是一个示例: 执行交叉连接:使用SELECT语句执行交叉连接操作。交叉连接(CROSS JOIN)是一种连接操作,它返回两个表的笛卡尔积,即每个表中的每一行与另一个表中的每一行组合。以下是一个示例: 在上面...
To test the datashare, go to query editor and run queries against the new database to make sure all the objects are available as part of the datashare. Analyze and process data with Data Wrangler You can now use Data Wrangler to a...
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An ODATA filter query to restrict the entries returned (e.g. stringColumn eq 'string' OR numberColumn lt 123). Order By $orderby string An ODATA orderBy query for specifying the order of entries. Top Count $top integer Total number of entries to retrieve (default = all). Skip Count...
An ODATA filter query to restrict the entries returned (e.g. stringColumn eq 'string' OR numberColumn lt 123). Order By $orderby string An ODATA orderBy query for specifying the order of entries. Top Count $top integer Total number of entries to retrieve (default = all). Skip Count...
.option("tempdir","s3n://path/for/temp/data") \ .load()# Read data from a querydf=sql_context.read\ .format("io.github.spark_redshift_community.spark.redshift") \ .option("url","jdbc:redshift://redshifthost:5439/database?user=username&password=pass") \ ...