
Charles J
Software Engineer, Data Engineer, AI and ML Developer
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Data Analyst Intern (SQL)
Windle • Full time
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.
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Valutazione dettagliata
- Livello di comunicazione del venditore
- Qualità della consegna
- Valore della consegna
Ordina per
honpatel

Stati Uniti
Amazing work, I will definitely hire again
50 USD
$
1 giorno
Tempo
honpatel

Stati Uniti
Very exception work, would recommend
50 USD
$
1 giorno
Tempo
brandon_wuzehao

Singapore
Got the job done and willing to accommodate to urgent request
50 USD-100 USD
$
4 giorni
Tempo