From bbbe5c7c60bdba41467e1bddfefa2b61e8e80450 Mon Sep 17 00:00:00 2001
From: medina5 <emmanuel.medina@univ-lorraine.fr>
Date: Sat, 15 Nov 2025 14:50:03 +0100
Subject: [PATCH] operations

---
 banque.md        |  1 -
 banque.tables.md | 57 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/banque.md b/banque.md
index ac8176e..6c976dd 100644
--- a/banque.md
+++ b/banque.md
@@ -59,7 +59,6 @@ Il existe deux méthodes pour gérer le type.
 2. utiliser une énumération `enum`.
 
 
-
 #### 1.2 Vérifications
 
 - Lister tous les titulaires. Pour réutiliser rapidement la requête enregistrer la dans une vue.
diff --git a/banque.tables.md b/banque.tables.md
index 718d95a..7291ce2 100644
--- a/banque.tables.md
+++ b/banque.tables.md
@@ -56,3 +56,60 @@ create table bank (
   "name" text
 );
 ```
+
+## 2. Les monnaies
+
+```sql
+create table currency (
+  "code" text primary key
+);
+```
+
+```sql
+create table exchange_rate (
+  "currency_code" text references currency(code) on delete cascade,
+  "date" date ,
+  "rate" decimal not null,
+  primary key (currency_code, date)
+);
+```
+
+## 3. Les comptes
+
+```sql
+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,
+  "currency_code" text not null references currency (code)
+);
+```
+
+```sql
+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) not null default 1 check (share > 0 and share <= 1),
+  primary key (account_id, holder_id)
+);
+```
+
+### 4. Les transactions
+
+```sql
+create table transaction (
+  "id" bigint primary key generated always as identity,
+  "transaction_date" timestamp not null default current_timestamp,
+  amount decimal not null check (amount > 0)
+);
+```
+
+```sql
+create table operation (
+  "id" bigint primary key generated always as identity,
+  "transaction_id" bigint not null references transaction(id),
+  "account_id" bigint not null references account(id),
+  amount decimal not null check (amount > 0),
+  direction text not null check (direction in ('DEBIT', 'CREDIT'))
+);
+```