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Introduction
Exercises with artist, museums and their pieces of art
Exercises with the band members table
12. How many members does each band have?
Exercises with tables of Japanese 100 Yen store
Exercises with employees, salaries and benefits

## Instruction

Great! Here comes the next one.

## Exercise

Show the nickname of the leader of each band, together with the corresponding band_id and the number of members the band has.