Data type

As explained in Effective Data Analysis

A data type specifies the kind of value a field can contain and the operations or representation associated with that value.

A data type specifies the kind of value a field can contain and the operations or representation associated with that value. Choosing consistent types is part of structuring data for reliable use. section 11.3.1

Data types matter when teams:

• Correct discrepancies between incoming data and existing warehouse fields. section 11.3.1
• Represent dates consistently so users do not need manual conversions. section 11.3.1
• Choose Boolean fields for operational indicators such as whether a forecast is most recent. section 11.3.1

Weather data integration

A tourism company combines weather API data with warehouse models. Consistent date types support analysis, while a Boolean field identifies the most recent forecast and a zip_code field preserves a usable join key. section 11.3.1

Figure 11.11 Structuring data in a warehouse involves ensuring it can be easily and accurately queried.

Use the warehouse-structure figure to connect data types with accurate querying and broader data organization. section 11.3.1

How Effective Data Analysis covers it

How deep it goes

Explains types through cleaning and ETL examples, but stops short of cataloging type systems or implementation details.

Examples

Uses weather API records, zip codes, date fields, and a most_recent Boolean indicator.

What you can do after

Apply data types when correcting mismatched fields and preserving usable join keys across integrated datasets.

How it connects

Connects data types with data structure, ETL, data warehouses, join keys, dates, and Boolean fields.

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Related concepts

• classincludes · A class is a programming-language construct that defines a type’s structure or behavior and provides a basis for creating or representing objects.
• contractincludes · An API contract is a specification of the operations, data, and behavioral expectations that govern interactions between software components.
• stringincludes · A string is a programming-language value representing an ordered sequence of characters or character units as text.
• schemapart of · A data schema is a formal specification of the structure, fields, types, relationships, and constraints of data.
• integerincludes · An integer is a whole number with no fractional part, including negative numbers, zero, and positive numbers.
• dateincludes · A date is a calendar value identifying a particular day.

This explainer was generated by Manning's knowledge graph from the text of Effective Data Analysis. The section links point to the parts of the book it draws on.