diff --git a/prisma/schema.prisma b/prisma/schema.prisma
index 8363ea0..fcca23f 100644
--- a/prisma/schema.prisma
+++ b/prisma/schema.prisma
@@ -102,6 +102,8 @@ model LeaveRequests {
   id              Int                 @id @default(autoincrement())
   employee        Employees           @relation("LeaveRequestEmployee", fields: [employee_id], references: [id])
   employee_id     Int
+  bank_code       BankCodes?           @relation("LeaveRequestBankCodes", fields: [bank_code_id], references: [id])
+  bank_code_id    Int
   leave_type      LeaveTypes
   start_date_time DateTime            @db.Date
   end_date_time   DateTime?           @db.Date
@@ -130,7 +132,7 @@ model LeaveRequestsArchive {
 
 //pay-period vue
 view PayPeriods {
-  period_number Int      @id
+  period_number Int      
   start_date    DateTime @db.Date
   end_date      DateTime @db.Date
   year          Int
@@ -167,8 +169,8 @@ model Shifts {
   id            Int        @id @default(autoincrement())
   timesheet     Timesheets @relation("ShiftTimesheet", fields: [timesheet_id], references: [id])
   timesheet_id  Int
-  shift_code    ShiftCodes @relation("ShiftShiftCode", fields: [shift_code_id], references: [id])
-  shift_code_id Int
+  shift_code    BankCodes @relation("ShiftBankCodes", fields: [bank_code_id], references: [id])
+  bank_code_id  Int
   description   String?
   date          DateTime @db.Date
   start_time    DateTime @db.Time(0)
@@ -194,22 +196,26 @@ model ShiftsArchive {
   @@map("shifts_archive")
 }
 
-model ShiftCodes {
-  id         Int    @id @default(autoincrement())
-  shift_type String
-  bank_code  String
+model BankCodes {
+  id        Int     @id @default(autoincrement())
+  type      String
+  categorie String
+  modifier  Float
+  bank_code String
 
-  shift Shifts[] @relation("ShiftShiftCode")
+  shifts         Shifts[]         @relation("ShiftBankCodes")
+  expenses       Expenses[]       @relation("ExpenseBankCodes")
+  leaveRequests  LeaveRequests[]  @relation("LeaveRequestBankCodes")
 
-  @@map("shift_codes")
+  @@map("bank_codes")
 }
 
 model Expenses {
   id                 Int          @id @default(autoincrement())
   timesheet          Timesheets   @relation("ExpensesTimesheet", fields: [timesheet_id], references: [id])
   timesheet_id       Int
-  expense_code       ExpenseCodes @relation("ExpenseExpenseCode", fields: [expense_code_id], references: [id])
-  expense_code_id    Int
+  bank_code          BankCodes    @relation("ExpenseBankCodes", fields: [bank_code_id], references: [id])
+  bank_code_id       Int
   date               DateTime     @db.Date
   amount             Decimal      @db.Money
   attachement        String?
@@ -239,16 +245,6 @@ model ExpensesArchive {
   @@map("expenses_archive")
 }
 
-model ExpenseCodes {
-  id           Int    @id @default(autoincrement())
-  expense_type String
-  bank_code    String
-
-  expense Expenses[] @relation("ExpenseExpenseCode")
-
-  @@map("expense_codes")
-}
-
 model OAuthAccessTokens {
   id                   String    @id @default(cuid())
   user                 Users     @relation("UserOAuthAccessToken", fields: [user_id], references: [id])