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As explained in Build Financial Software with Generative AI (From Scratch)

A database view is a virtual table defined by a stored query over one or more database tables.

A database view is a virtual table produced by a stored query over database tables. It presents related data without requiring users to repeatedly assemble it themselves. section 5.9

Views are useful when a normalized design separates records across several tables but applications still need a unified way to inspect the original data. A view can preserve data integrity while making raw records easier to retrieve and troubleshoot. section 5.9

Combining ACH records

The combined_ach_records view joins related ACH record tables and uses UNION ALL to expose the uploaded ACH file as one searchable result, without processing changes. section 5.9

How Build Financial Software with Generative AI (From Scratch) covers it

How deep it goes
Defines the virtual-table model and demonstrates creation with joins and UNION ALL, without covering broader view management.
Examples
Uses the combined_ach_records view to reunite unparsed ACH record types for raw-file display and exception troubleshooting.
What it assumes
Assumes separated database tables and related record identifiers that can be joined into a stored query.
What you can do after
Operate/configure a database view that combines related tables into a convenient read interface.
How it connects
Connects database views with stored queries, database tables, joins, data integrity, and ACH files.

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This explainer was generated by Manning's knowledge graph from the text of Build Financial Software with Generative AI (From Scratch). The section links point to the parts of the book it draws on.