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Data type

As explained in Practical Automation with PowerShell: Effective scripting from the console to the cloud

A data type classifies the representation and permitted values of data, such as an integer, string, or binary value.

A data type identifies what a value represents and constrains how automation or a database stores and uses it. In PowerShell-driven workflows, type information turns loosely structured test data into values that can be applied reliably. section 6.2.3 section 7.1.1

Choose types according to the destination and the meaning of each value:

  • For registry checks, add a Type property such as DWORD, then add Data containing the value to set when a check fails. Defaulting Data from the first test value accelerates structure generation, while exceptional entries can be corrected afterward. section 6.2.3
  • For SQL columns, map values to types such as int, float, double, real, decimal, nvarchar, uniqueidentifier, or bit according to their size and meaning. section 7.1.1
  • Treat strings deliberately: nvarchar supports Unicode and requires a maximum length; nvarchar max can hold approximately one billion characters but is usually inefficient. section 7.1.1
  • Decide nullability separately from the type. Require values that identify or reference source records, but allow null when a field may legitimately be absent, such as a server cost center. section 7.1.1

Generating typed registry-resolution data

Import the existing JSON, project every object with two added properties, and export the result as a new file: Type defaults to DWORD, while Data takes the first test value. This creates a reusable starting point instead of manually editing every entry. section 6.2.3

How Practical Automation with PowerShell: Effective scripting from the console to the cloud covers it

How deep it goes
Explains practical type selection, string sizing, and nullability, then applies them to JSON properties and SQL column maps.
Examples
Uses DWORD and test values for registry remediation, plus an nvarchar-based Servers table with identity and nullable settings.
What it assumes
Assumes familiarity with PowerShell objects, JSON, registry checks, and basic table design while clarifying practical SQL type choices.
What you can do after
Apply it by generating typed JSON metadata and configuring SQL columns with type, length, nullability, and identity settings.
How it connects
Connects data types with PowerShell objects, JSON, registry checks, SQL schemas, Unicode strings, and nullability.

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This explainer was generated by Manning's knowledge graph from the text of Practical Automation with PowerShell: Effective scripting from the console to the cloud. The section links point to the parts of the book it draws on.