
Charles J
Software Engineer, Data Engineer, AI and ML Developer
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Experiência profissional
Data Analyst Intern (SQL)
Windle • Período integral
Jan 2023 - Aug 2023 • 7 mos
Wrote complex SQL queries across PostgreSQL databases to extract, clean, and analyse business datasets for weekly management reporting. Built and maintained ETL pipelines that pulled data from multiple source systems into a central data warehouse, reducing manual data preparation time by 35%. Created data quality checks using SQL (NULL validation, duplicate detection, row count reconciliation) to ensure pipeline integrity across all reporting tables. Collaborated with senior analysts to design dashboard-ready summary views and aggregation tables consumed by Power BI reports. Documented SQL query logic and pipeline steps, improving team knowledge sharing and onboarding efficiency.
3 Avaliações
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Ordenar por
honpatel

Estados Unidos
Amazing work, I will definitely hire again
US$ 50
$
1 dia
Tempo
honpatel

Estados Unidos
Very exception work, would recommend
US$ 50
$
1 dia
Tempo
brandon_wuzehao

Singapura
Got the job done and willing to accommodate to urgent request
US$ 50-US$ 100
$
4 dias
Tempo