CRM * Churn/Retention * Customer Analytics
SQL (BigQuery/Impala) * Python * Experimentation * Reporting

• Customer segmentation / churn drivers / retention tactics
• Campaign measurement (uplift, cohort, A/B test) & KPI governance
• Reusable SQL/Python patterns for analytics & operations

• analytics-code-archive
  SQL & Python snippets for CRM analytics, churn, and measurement
  - foldered by use-case (joins, ranges, sessionization, etc.)

• experiment-toolkit (planned)
  A/B test & uplift templates (SQL + Python notebook)

• dashboard-notes (planned)
  KPI frameworks & reporting patterns (Tableau-ready metrics)

• SQL patterns (BigQuery/Impala): joins, window functions, sessionization, cohort, retention, KPI tables
• Python utilities: pandas EDA, metric validation, quick plots, experiment analysis helpers
• Documentation-first: README jungsimeuro "wae ireohge ceugjeonghaessneunji"ggaji

• Repository: analytics-code-archive
• Contact: dnalschl1989@gmail.com