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Data Load in Synapse Table?

Cloud/Toolsmedium0.6 min readPremium
Frequency
Low
Asked at 1 company
Category
179
questions in Cloud/Tools
Difficulty Split
104E|27M|48H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Deloitte
Interview Pro Tip

Red Flag: Loading via INSERT…SELECT without distribution strategy. Pro-Move: 'We use COPY INTO from staged Parquet with distribution on order_id—10TB loads in 2 hours; we tuned via DMVs.'

Key Concepts Tested
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Expert AnswerPremium
111 wordsInterview-ready
Architectural logic: Synapse is MPP—distribution and indexing dictate load and query performance. COPY INTO is the native bulk path; ADF Copy Data supports it via PolyBase or bulk INSERT. Why COPY INTO: Reads from external stage (Blob/ADLS); parallel load across distributions; minimal log overhead. Scalability: Distribution key choice matters—hash on join keys for fact tables; round-robin for staging. CCI vs HEAP: CCI for analytics (column-store); HEAP for staging or small tables....
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