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How PostgreSQL Aggregates Work and How to Create and Use Custom Aggregates
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- 1 Introduction
- 2 Aggregates vs Functions
- 3 How aggregates work
- 4 State transition function
- 5 Complex aggregates
- 6 Parallelization
- 7 Create Aggregate Statement
- 8 SQL Aggregate Example
- 9 Two Step Aggregate Design
- 10 Two Step Aggregate Functions
- 11 Deduplication
- 12 Aggregate vs Accessor
- 13 Rollup
- 14 Questions
