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PostgreSQL JOINs

Challenge time

Instruction

Okay! Here come the last table for this set.

Exercise

Select all data from the timetable table. It contains information about the lesson schedule for each group. Every group has two lessons per week. The table has four columns:

  • group_id – the id of a given group,
  • room_id – the id of the room where a given group has a class on a particular day,
  • day – the day when a given group has a class, and
  • hour – the exact time when a particular class begins.