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Database selection guide · 15 databases · local only
Requirements
Step 1
Data Structure
Structured
Semi-structured
Unstructured
Graph
Time-series
Query Patterns
(multi-select)
Key lookup
Complex queries
Full-text search
Graph traversal
Aggregations
Data Scale
< 1 GB
1 GB – 1 TB
1 TB+
Read / Write Ratio
Read-heavy
Write-heavy
Balanced
Consistency Requirement
Strong
Eventual
Flexible
Latency Requirement
< 1 ms
< 10 ms
< 100 ms
Flexible
ACID Transactions
Yes — required
No — not needed
Open Source Preference
Open source only
Managed / commercial OK
No preference
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