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Introduction
Dealing with dates
Working with time
Date and time data types in PostgreSQL
Extracting dates and times
Timezone conversion
Format date and time
Current date and time data
Summary
51. Exercise 4

Instruction

Wow, you're making great progress! Let's keep going.

Exercise

Find yearly delay averages. Show two columns: year extracted from the flight_date column, and avg_delay – the average delay in that year.