From 6971d03d7169e65cd4a30ba5115e8c56e5909c33 Mon Sep 17 00:00:00 2001
From: medina5 <emmanuel.medina@univ-lorraine.fr>
Date: Fri, 7 Nov 2025 20:55:42 +0100
Subject: [PATCH] banque final

---
 banque.final.sql | 93 ++++++++++++++++++++++++++++++++++++++++++++++++
 banque.md        |  2 +-
 2 files changed, 94 insertions(+), 1 deletion(-)
 create mode 100644 banque.final.sql

diff --git a/banque.final.sql b/banque.final.sql
new file mode 100644
index 0000000..d7b1300
--- /dev/null
+++ b/banque.final.sql
@@ -0,0 +1,93 @@
+drop schema if exists bank cascade;
+create schema bank;
+set search_path TO bank;
+
+/*
+ * Holder : table commune à tous les titulaires
+ */
+create type holder_type as enum ('BANK', 'PERSON', 'COMPANY');
+
+create table holder (
+  "id" bigint primary key generated always as identity,          -- identifiant unique
+  "type" holder_type  not null,
+  "created_at" timestamp not null default current_timestamp      -- date et heure de création
+);
+
+/*
+ * Bank
+ */
+create table bank (
+  "id" bigint primary key references holder(id),          -- identifiant unique
+  "name" text not null                 
+);
+
+/*
+ * Person
+ */
+create table person (
+  "id" bigint primary key references holder(id) on delete cascade,
+  "firstname" text not null,
+  "lastname" text not null,
+  "birthdate" date not null
+);
+
+/*
+ * Company
+ */
+create table company (
+  "id" bigint primary key references holder(id) on delete cascade,
+  "name" text not null,
+  "registration_number" text unique not null,
+  "created_at" date not null
+);
+
+create table currency (
+  "code" text primary key
+);
+
+create table exchange_rate (
+  "currency_code" text references currency(code) on delete cascade,
+  "date" date,
+  "rate" decimal,
+  primary key (currency_code, date)
+);
+/*
+ * Account
+ * La contrainte check (balance >= 0) empêche les soldes négatifs
+ */
+create table account (
+  "id" bigint primary key generated always as identity,
+  "opened_at" date not null default current_date,
+  "balance" numeric(18,6) not null default 0 check (balance >= 0),
+  "currency_code" text references currency (code)
+);
+
+/*
+ * Account -> Holder
+ * Cette table établit la relation n–n entre account et holder.
+ * Un compte joint correspond donc à plusieurs lignes dans cette table.
+ * La contrainte share assure que les parts sont comprises entre 0 et 1.
+ */
+create table account_holder (
+  "account_id" int not null references account(id) on delete cascade,
+  "holder_id" int not null references holder(id) on delete cascade,
+  "share" decimal(4,3) default 1 check (share > 0 and share <= 1),
+  primary key (account_id, holder_id)
+);
+
+
+
+
+create table transaction (
+  "id" bigint primary key generated always as identity,
+  "transaction_date" timestamp default current_timestamp,
+  amount decimal check (amount > 0)
+);
+
+create table operation (
+  "id" bigint primary key generated always as identity,
+  "transaction_id" bigint references transaction(id),
+  "account_id" bigint references account(id),
+  amount decimal check (amount > 0),
+  direction text check (direction in ('DEBIT', 'CREDIT'))
+);
diff --git a/banque.md b/banque.md
index b6e4501..ef30837 100644
--- a/banque.md
+++ b/banque.md
@@ -374,7 +374,7 @@ erDiagram
 
   transaction {
     bigint id PK
-    date date
+    timestamp transaction_date
     decimal amount
   }