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Task 11: 
Find all records in the penguins table about penguins with body weight less than the average for their species and sex.

Use SQLite syntax to write your answer. Descriptions of tables are provided in the right pane.

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Querynomicon (SQLite)

A compact database for learning the basics of SQL.

The Querynomicon database contains tables:

department - table of departments.
  • identDepartment ID.
  • nameDepartment name.
  • buildingBuilding name.
ident name building
gen Genetics Chesson
little_penguins - table of little penguins.
  • speciesPenguin species.
  • islandIsland of residence.
  • bill_length_mmBill length, mm.
  • bill_depth_mmBill depth, mm.
  • flipper_length_mmFlipper length, mm.
  • body_mass_gBody mass, g.
  • sexSex.
species island bill_length_mm bill_depth_mm flipper_length_mm body_mass_g sex
Gentoo Biscoe 52.1 17 230 5550 MALE
penguins - table of penguins.
  • speciesPenguin species.
  • islandIsland of residence.
  • bill_length_mmBill length, mm.
  • bill_depth_mmBill depth, mm.
  • flipper_length_mmFlipper length, mm.
  • body_mass_gBody mass, g.
  • sexSex.
species island bill_length_mm bill_depth_mm flipper_length_mm body_mass_g sex
Gentoo Biscoe 52.1 17 230 5550 MALE
staff - table of employees.
  • identEmployee number.
  • personalEmployee first name.
  • familyEmployee last name.
  • deptDepartment.
  • ageAge.
ident personal family dept age
7 Abram Chokshi gen 23
machine - table of machines.
  • identMachine ID.
  • nameMachine name.
  • detailsJSON with details.
ident name details
1 WY401 {"acquired": "2023-05-01"}
2 Inphormex {"acquired": "2021-07-15", "refurbished": "2023-10-22"}
3 AutoPlate 9000 {"note": "needs software update"}