Teradata Univariate Statistics

Teradata Univariate Statistics

Core Capabilities

• Automated table structure analysis via DBC.ColumnsV
• Dynamic SQL generation for TD_UnivariateStatistics
• Complete workflow from data preparation to results interpretation
• Data quality validation and preprocessing guidance
• Parameter optimization and tuning

Key Parameters

• TargetColumns: Numeric columns to analyze (comma-separated)
• StatisticsGroups: 'BASIC','PERCENTILE','MOMENTS','QUANTILE','ALL'

Use Cases

1. Exploratory data analysis
2. Feature distribution profiling
3. Data quality assessment
4. Pre-modeling data understanding
5. Outlier detection via statistics

Example Usage

-- TD_UnivariateStatistics execution
SELECT * FROM TD_UnivariateStatistics (
    ON {USER_DATABASE}.{USER_TABLE} AS InputTable
    USING
    TargetColumns ('{NUMERIC_COLUMNS}')
    StatisticsGroups ('ALL')           -- 'BASIC','PERCENTILE','MOMENTS','QUANTILE','ALL'
) AS dt;

Scripts Included

Core Analytics Scripts

• table_analysis.sql: Automatic table structure discovery
• preprocessing.sql: Data preparation and feature engineering
• model_training.sql: TD_UnivariateStatistics execution
• evaluation.sql: Results analysis and metrics
• complete_workflow_template.sql: End-to-end workflow

Utility Scripts

• data_quality_checks.sql: Comprehensive data validation
• parameter_tuning.sql: Parameter optimization
• diagnostic_queries.sql: Results diagnostics and interpretation

Best Practices

• Always run table_analysis.sql first to understand your data structure
• Validate data quality before executing the analytical function
• Use parameter_tuning.sql to find optimal configuration
• Review diagnostic_queries.sql output for model/results validation

Limitations

• Requires Teradata Vantage 17.20+ with ClearScape Analytics
• Input data must meet function-specific requirements
• Results depend on data quality and parameter configuration

Teradata Univariate Statistics - ClearScape Analytics skill for Teradata Vantage