Data Quality

6 2 C H A P T E R 3 Sources of Inaccurate Data

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Metadata repository

Data ][ Mapping

profiling systems

Data

extraction

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Designing and

planning

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Data

cleansing

Data

transforms

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Data

loading

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Moving and restructuring data

F I G U R E 3 9

4

Steps in the data movement process.

Data Integration

The previous section covered what can go wrong when data is taken from one

system to another. Data integration projects that fetch data from source sys-

tems and use them in new applications have all the same problems. They may

be only fetching tiny amounts of data for each use. However, ...