Question

I’m trying to update all rows (only 3 columns I have to update) from a table that have an equal value on another table…

Here are my tables…

CREATE TABLE [dbo].[prods](
    [IdProducto] [int] IDENTITY(1,1) NOT NULL,
    [IdGrupo] [int] NULL,
    [IdCategoria] [int] NULL,
    [IdAlmacen] [varchar](50) NULL,
    [Codigo] [varchar](50) NULL,
    [Nombre] [varchar](50) NULL,
    [Descripcion] [varchar](max) NULL,
    [Cantidad] [int] NULL,
    [Imagen] [varchar](max) NULL,
    [StockMin] [int] NULL,
    [StockMax] [int] NULL,
    [Ancho] [varchar](50) NULL,
    [Alto] [varchar](50) NULL,
    [Largo] [varchar](50) NULL,
    [Peso] [varchar](50) NULL,
    [Volumen] [varchar](50) NULL,
    [Color] [varchar](50) NULL,
    [Material] [varchar](50) NULL,
    [Presentacion] [varchar](50) NULL,
    [bitPrecioVentaUnico] [int] NULL,
    [PrecioCompra] [money] NULL,
    [DescuentoCompra] [float] NULL,
    [PrecioVenta] [money] NULL,
    [DescuentoVenta] [float] NULL,
    [Estado] [varchar](20) NULL
)

CREATE TABLE [dbo].[prodnuevos](
    [Codigo] [int] NULL,
    [itemid] [int] NULL,
    [Item] [varchar](255) NULL,
    [Categoria] [varchar](255) NULL,
    [Cantidad] [int] NULL,
    [Minima] [nvarchar](255) NULL,
    [Costo] [money] NULL,
    [Valor] [money] NULL,
    [peso] [float] NULL,
    [unidades] [float] NULL
)

What I want to do is the following..

Update prods 
Set prods.PrecioCompra = prodnuevos.Costo, 
prods.PrecioVenta = prodnuevos.Costo, 
prods.Cantidad = prodnuevos.Cantidad 
WHERE prods.Nombre = prodnuevos.Item;

(Update PrecioCompra, PrecioVenta and Cantidad in prods using prodnuevos’ Costo and Cantidad where Nombre and Item is the same)

Obviosly the query above does not work, but I just wanted to explain my problem.
I have tried various combinations of queries with success at all. (Despite having to update 3 columns, I don’t mind if I have to use 3 different queries)

I have tried things like

    UPDATE       prods c
    SET          c.PrecioCompra =
      (SELECT        a.Costo
      FROM            prodnuevos AS a INNER JOIN
         prods AS z ON z.Nombre = a.Item 
WHERE        (a.Item = c.Nombre))

but no result…

Am I doing something wrong?? or it’s a totally different query??
Thanks in advance.

Answer 1

Update prods Set 
prods.PrecioCompra = prodnuevos.Costo,
prods.PrecioVenta = prodnuevos.Costo, 
prods.Cantidad = prodnuevos.Cantidad
from prods inner join prodnuevos
on prods.Nombre = prodnuevos.Item