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Range partition

Partition by a value range.

Range partition

Range partition splits by value range. Ideal for date ranges.

CREATE TABLE sales (...) PARTITION BY RANGE (sale_date);
CREATE TABLE sales_2026_q1 PARTITION OF sales
  FOR VALUES FROM ('2026-01-01') TO ('2026-04-01');

Partition for Q1 2026.

The table sales is created.

Range partition — details

Range partition defines ranges with FROM and TO. Each range is a separate partition.

For example, FOR VALUES FROM ('2026-01-01') TO ('2027-01-01') covers the year 2026; the end value is excluded, so ranges don't overlap.

Practice Range partition

Create the sales_2026_q1 partition with FOR VALUES FROM ('2026-01-01') TO ('2026-04-01').

Starter code

query.sql
-- range partition
CREATE TABLE sales_2026_q1 PARTITION OF sales

Sample solution

query.sql
CREATE TABLE sales_2026_q1 PARTITION OF sales
  FOR VALUES FROM ('2026-01-01') TO ('2026-04-01');

Expected output

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Questions and answers

Review the lesson questions together with their answers. To test yourself, solve the lesson interactively.

1 Add RANGE

Question 
PARTITION BY ____ (sale_date)
Answer 
PARTITION BY RANGE (sale_date)

Explanation: RANGE partitioning splits the table by ranges of values such as dates.

2 What does range partition split by?

  • A list
  • Color
  • A hash
  • A range of values Correct answer

Explanation: Range partition splits by value range.

3 Range partition: match the terms

Term Meaning
RANGE range
FROM start
TO end
date partition

All lessons in Advanced

1 CTE

  1. What is a CTE?
  2. Using WITH
  3. Multiple CTEs
  4. CTE vs subquery
  5. CTE with JOIN
  6. Summary - CTE

2 Recursive CTE

  1. What is a recursive CTE?
  2. Anchor and recursive parts
  3. Walk a hierarchy
  4. Tracking depth
  5. Stopping recursion
  6. Summary - Recursive CTE

3 Window functions

  1. What is a window function?
  2. ROW_NUMBER
  3. RANK and DENSE_RANK
  4. LAG and LEAD
  5. PARTITION BY
  6. Summary - Window functions

4 Project: Analytics report

  1. Analytics design
  2. CTE summary
  3. Top users with ROW_NUMBER
  4. Growth with LAG
  5. Final report

5 Pivot and unpivot

  1. What is pivot?
  2. Pivot with CASE
  3. FILTER clause
  4. Unpivot
  5. Dynamic pivot
  6. Summary - Pivot

6 Materialized view

  1. What is a materialized view?
  2. CREATE
  3. REFRESH
  4. View vs materialized view
  5. Index on materialized views
  6. Summary - Materialized view

7 Stored procedure

  1. What is a procedure?
  2. CREATE PROCEDURE
  3. Parameters
  4. CALL
  5. Control flow
  6. Summary - Stored procedure

8 Function

  1. What is a function?
  2. CREATE FUNCTION
  3. RETURN
  4. Calling a function
  5. Function vs procedure
  6. Summary - Function

9 Trigger

  1. What is a trigger?
  2. BEFORE and AFTER
  3. INSERT trigger
  4. UPDATE trigger
  5. Write an audit trigger
  6. Summary - Trigger

10 Transaction isolation

  1. What is isolation?
  2. READ UNCOMMITTED
  3. READ COMMITTED
  4. REPEATABLE READ
  5. SERIALIZABLE
  6. Summary - Isolation

11 Locking

  1. What is a lock?
  2. Shared and exclusive locks
  3. Deadlock
  4. SELECT FOR UPDATE
  5. Lock timeout
  6. Summary - Locking

12 Query optimization

  1. What is EXPLAIN?
  2. Seq scan vs index scan
  3. Cost
  4. Sargable
  5. N+1 problem
  6. Summary - Optimization

13 Partitioning

  1. What is partitioning?
  2. Range partition
  3. List partition
  4. Hash partition
  5. Partition pruning
  6. Summary - Partitioning

14 Advanced final

  1. Hierarchy report
  2. Window analysis
  3. Procedure and trigger
  4. Optimization