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SQL Monthly Electricity Averages
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SQL Monthly Electricity Averages

EasySQL · PostgreSQL

Problem

Can you write a SQL query to find the average consumption of electricity by month?

Use the electricity_consumption table and include all available readings. Null consumption values should not contribute to the average.

Output

  1. One row per calendar month
  2. Columns: consumption_month and average_consumption_kwh
  3. Round the average to two decimal places and sort months chronologically

Schema

electricity_consumption
ColumnTypeDescription
reading_idPKINTUnique identifier for the electricity reading
reading_dateDATEDate on which electricity consumption was recorded
consumption_kwhDECIMAL(12,2)Electricity consumption measured in kilowatt-hours
Tableselectricity_consumption
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Your question is SQL Monthly Electricity Averages. Start with the requirements and the one table in the Question tab.

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