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PostgreSQLPostgreSQL 16+

Query Execution & Indexing Fundamentals

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1. SQL Fundamentals0/6

Query Basics Aggregation JOINs Subqueries CTEs Window Functions

2. How PostgreSQL Executes Queries0/5

Query Lifecycle Scan Methods Sorting JOIN Algorithms Query Planner

3. Indexing0/1

Composite Indexes

4. Query Optimization0/3

Filtering & Sorting Joins & Aggregation Query Patterns

5. PostgreSQL Performance0/3

Monitoring Maintenance Memory

PostgreSQL SQL FundamentalsWindow Functions

Window Functions

OVER()
PARTITION BY
ORDER BY inside window
ROW_NUMBER()
RANK()
DENSE_RANK()
LEAD() / LAG()

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