Data AnalysisAbout 3 min read
Diagnose CSV Types and Missing-Value Distortion
Preserve raw tokens, establish a schema, and separate observed zero from missing and invalid values before summarizing.
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Data Analysis โ Technical solutions
Find a clear diagnosis before you change anything. Each guide explains the symptoms, likely causes, a contextual solution and how to verify the result.
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Data AnalysisAbout 3 min read
Diagnose Join Multiplication and Missing Matches
Check key uniqueness and relationship cardinality before treating a joined row count or total as an analytical result.
Read solutionData AnalysisAbout 3 min read
Resolve Inconsistent Rates and Time Windows
Reconstruct the eligible population, event numerator, and reporting window before comparing percentages from different outputs.
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