Question

I have a question and I can’t come up with a good way to solve it, this is using SQLServer 2008R2.

I have 3 tables

Client, Invoice, Car

The client is duplicate n times, but each client has a ticket and one product.

So I am trying to consolidate the clients (with a unique identifier), now my question would be how to update the reference field on the product and ticket.

Example

**Client**

[Nombre]
      ,[Apellido_Paterno]
      ,[Apellido_Materno]
      ,[Sexo]
      ,[Estado_Civil]
      ,[Fecha_Nacimiento]
      ,[RFC]
      ,[Saludo]
      ,[Persona]
      ,[Razon_Social]
      ,[Direccion]
      ,[Colonia]
      ,[Municipio_Delegacion]
      ,[Estado]
      ,[Codigo_Postal]
      ,[Lada_Casa]
      ,[Telefono_Casa]
      ,[Ext_Telefono_Casa]
      ,[Lada_Oficina]
      ,[Telefono_Oficina]
      ,[Ext_Telefono_Oficina]
      ,[Telefono_Celular]
      ,[Email_Personal]
      ,[Vehiculo_Actual_Anterior]
      ,[Marca_Actual_Anterior]
      ,[AnioModelo_Actual_Anterior]
      ,[Color_Actual_Anterior]
      ,[Escolaridad]
      ,[Venta_Id]
      ,[Nombre1]
      ,[Nombre2]

**Invoice**

[Factura_Cliente]
      ,[Factura_Distribuidor]
      ,[Precio_Base_Vehiculo]
      ,[Precio_Accesorios]
      ,[Precio_Vehiculo_DeContado]
      ,[Descuento]
      ,[Incentivo_Calculado]
      ,[Fecha_Entrega_DelVehiculo]
      ,[Fecha_Factura_Cliente]
      ,[Clave_Distribuidor]
      ,[Seguro_Gratis]
      ,[Clave_Promocion]
      ,[Tipo_Venta]
      ,[Unidad_de_Intercambio]
      ,[Venta_Id]

**Car**

[Modelo]
      ,[Marca]
      ,[AnioModelo]
      ,[Basico]
      ,[Cabecera]
      ,[Version]
      ,[Color_Exterior]
      ,[Color_Interior]
      ,[VIN]
      ,[Motor]
      ,[Transmision]
      ,[Origen]
      ,[Basico_Linea_Modelo]
      ,[Venta_Id]

I can consolidate the clients, (even if they have discrepancies on their fields), but I can’t find a effective solution for this.

Edit: The first column on client shows the duplicate, while the second is the id that match the ticket and product.

Answer 1

i would make two more tables.

one for new consolidated clients (with all the same fields as the normal client)
and a mapping table between the old client and the new client.

this mapping table should store the id of the old one, and which i it was mapped to as a new one.

from here its pretty easy. update the other tables with the new id based on its current old id in the map table..