38 lines
853 B
Markdown
38 lines
853 B
Markdown
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# Corrections
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## 1. Les titulaires
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`person` : informations propres aux personnes physiques
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- prénom, nom, date de naissance
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`company` : informations propres aux entreprises
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- raison sociale, numéro d’immatriculation, date de création
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### 1.6 Contôle de l'âge
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Contrainte déclarative
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```sql
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alter table person
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add constraint chk_person_minimum_age
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check (birthdate <= current_date - interval '15 years');
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```
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Contrainte procédurale avec un trigger :
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```sql
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create or replace function check_person_age()
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returns trigger as $$
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begin
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if new.birthdate > current_date - interval '15 years' then
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raise exception 'Holder must be at least 15 years old';
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end if;
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return new;
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end;
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$$ language plpgsql;
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create trigger trg_check_person_age
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before insert or update on person
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for each row execute procedure check_person_age();
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```
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