Metadata: Metadata tells you everything about the usage, structure, definition, location, ownership, creation, values, source, and other features of the data sets in the warehouse. Data Integration: Data integration is the process of merging data records from different sources into an integrated wa...
A Study on Data warehouse with metadata for different online analytical processing (OLAP) and online transaction processing (OLTP) are basically main necessity of the large database collection in business, corporate fields and many areas using Research ideas and developing new ideas using SCD types....
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As shown above, a variety of data sources feed the warehouse using theExtract, Load, and Transform (ELT) process. Metadata, summary data, and raw data reside in the warehouse and consumers access this data using analytics orbusiness intelligence tools. The enterprise data warehouse itself typicall...
Software as a service (SaaS)—including content metadata stores, metadata caches, and relationship graph data stores. Amazon DocumentDB Amazon DocumentDBis a fully managed document database service. It is scalable, highly-available, and compatible with MongoDB. With it, you can store, index, and...
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Each element in anARRAYtype has a position, indexed starting from zero, and a value. Each element in aMAPtype represents a key-value pair. Impala provides pseudocolumns that let you retrieve this metadata as part of a query, or filter query results by including such things in aWHEREclause....
Using the INFORMATION_SCHEMA for metadata queries causes the Microsoft SQL API to return incorrect values for char and varchar data types (-8 and -9 respectively, instead of 1 and 12 as defined in sqlext.h) when SQLColumns() is called. Enabling the NO_I_IS option causes the issue to ...
Finally, audit trails are examined to track that the process is tracking any changes that occur during the ETL process and verify if history and metadata are present. This above section should give you a basic oversight of how the ETL data quality checks are performed. You’ll note that test...
We use an AWS CloudFormation template to deploy and run this solution in your AWS account. Along with other resources, this template creates an Amazon Simple Storage Service (Amazon S3) bucket to store all data and metadata related to this process. The following diagram shows the sol...