SCD Implementation Generator

Overview

Generates Slowly Changing Dimension implementations across platforms. This skill automates the creation of SCD patterns for proper historical tracking.

Capabilities

• SCD Type 1/2/3/4/6 implementation
• MERGE statement generation
• dbt snapshot configuration
• Historical tracking optimization
• Surrogate key management
• Effective date handling
• Current flag management
• Mini-dimension design

Input Schema

json
{
  "dimension": {
    "name": "string",
    "columns": ["object"],
    "businessKey": ["string"]
  },
  "scdType": "1|2|3|4|6",
  "platform": "snowflake|bigquery|redshift|dbt",
  "trackingColumns": ["string"]
}

Output Schema

json
{
  "ddl": "string",
  "mergeStatement": "string",
  "dbtConfig": "object",
  "documentation": "string"
}

Target Processes

• SCD Implementation
• Dimensional Model Design
• dbt Model Development

Usage Guidelines

1. Define dimension structure with business keys
2. Select appropriate SCD type for business requirements
3. Specify target platform for syntax generation
4. Identify columns to track for historical changes

Best Practices

• Use SCD Type 2 for attributes requiring full history
• Implement surrogate keys for dimension tables
• Use effective dates rather than just current flags
• Consider mini-dimensions for rapidly changing attributes
• Test SCD logic with representative change scenarios