ETL is a data integration process that extracts, transforms and loads data from multiple sources into a data warehouse or other unified data repository.
The ETL process requires more definition at the onset. Specific data points need to be identified for extraction along with any potential “keys” to integrate across disparate source systems. The source of input data is often tracked by using metadata. Even after that work is completed, the bu...
A further auditing function provided by Project REAL is support for data lineage. A batch identifier is added to the data flow immediately after the data extract by using a Derived Column transformation . This metadata is therefore available to all downstream transformations for update, insert and ...
1.定义一个etl函数, 里面传入json行数据, 用json.loads加载行数据,并对行数据进行判断,如果没有行数据,或data字段没有在行数据里, 就直接返回空的结果, 否则就继续往下执行 2.接着获取行里的数据, 用for循环判断, 如果包含某个值, 我就将变量赋值取出, 装在集合容器里 3.设置sparksession会话, 并enableHive...
Support for migrating data queried using SQL statements and automatically creating views based on the SQL statements for later reference Support the complex conversion of the extracted data, such as: add/delete/change fields, add/delete/change lines, split lines, mergers, etc. Performance Implemente...
Here is our recommendation for the criteria to consider: Connector need coverage: does the ETL tool extract data from all the multiple systems you need, should it be any cloud app or Rest API, relational databases or noSQL databases, csv files, etc.? Does it support the destinations you ne...
Strong community support: Hadoop offers wide adoption and a robust community. Suitable for handling massive amounts of data: Efficient for large-scale data processing. Pricing: Free 7. Informatica PowerCenter Informatica PowerCenter is a common data integration platform widely used for enterprise data ...
Here is our recommendation for the criteria to consider: Connector need coverage:does the ETL tool extract data from all the multiple systems you need, should it be any cloud app or Rest API, relational databases or noSQL databases, csv files, etc.? Does it support the destinations you need...
PostgreSQL 支持参考文档 (Support for the PostgreSQL database.):https://docs.sqlalchemy.org/en/13/dialects/postgresql.html#module-sqlalchemy.dialects.postgresql.psycopg2 性能调优 其实就是加个参数好像。 https://www.psycopg.org/docs/extras.html#fast-execution-helpers ...
Extract Transform Load (ETL) is the process used to gather data from multiple sources and then bring it together to support discovery, reporting, analysis, and decision making.