@startuml

!include ./schemes_setup.wsd

$table("TRAINING", "training"){
    $pk("ID") INTEGER NOT NULL
    $fk("COACH") OPTIONAL INTEGER 
    $column("DATE") DATE
}

$table("COACH", "coach"){
    $pk("ID") INTEGER NOT NULL
    $column("NAME") VARCHAR
}

$table("EXERCISE", "exercise"){
    $pk("ID") INTEGER NOT NULL
    $fk("TRAINING") INTEGER NOT NULL
    $column("NAME") VARCHAR
}

$table("APPROACH", "approach"){
    $pk("ID") INTEGER NOT NULL
    $fk("EXERCISE") INTEGER NOT NULL
    $column("WEIGHT") FLOAT
    $column("REPS") INTEGER
}

training::COACH |o--|| coach::ID
exercise::TRAINING }|--|| training::ID
approach::EXERCISE }|--|| exercise::ID

@enduml