如何通過Row_Number更新列，每行的值不同？

Question

我現在有這張桌子

CREATE TABLE [dbo].[DatosLegales](
    [IdCliente] [int] NOT NULL,
    [IdDatoLegal] [int] NULL,
    [Nombre] [varchar](max) NULL,
    [RFC] [varchar](13) NULL,
    [CURP] [varchar](20) NULL,
    [IMSS] [varchar](20) NULL,
    [Calle] [varchar](100) NULL,
    [Numero] [varchar](10) NULL,
    [Colonia] [varchar](100) NULL,
    [Pais] [varchar](50) NULL,
    [Estado] [varchar](50) NULL,
    [Ciudad] [varchar](50) NULL,
    [CodigoPostal] [varchar](10) NULL,
    [Telefono] [varchar](13) NULL,
    [TipoEmpresa] [varchar](20) NULL,
    [Tipo] [varchar](20) NULL,
 CONSTRAINT [PK_DatosLegales] PRIMARY KEY CLUSTERED 
(
    [IdCliente] ASC
)WITH (PAD_INDEX  = OFF, STATISTICS_NORECOMPUTE  = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS  = ON, ALLOW_PAGE_LOCKS  = ON) ON [PRIMARY]
)

我需要更新IdDatoLegal列。 現在我在該表上有80行，所以我需要用數字1,2,3 ... 79,80更新每一行。

我已經嘗試過對存儲過程的簡單查詢，但根本沒有成功。

我現在有這個商店程序：

ALTER PROCEDURE dbo.ActualizarDatosLegales
@RowCount int 
AS 
DECLARE @Inicio int
SET @Inicio = 0
WHILE @Inicio < @@RowCount
SET @Inicio += 1;
BEGIN
UPDATE DatosLegales SET IdDatoLegal = @Inicio WHERE (SELECT ROW_NUMBER() OVER (ORDER BY IdCliente) AS RowNum FROM DatosLegales) = @Inicio;
END

它在運行時返回此消息

Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

我想這是因為在子查詢（SELECT ROW_NUMBER（）OVER（ORDER BY IdCliente）AS RowNum FROM DatosLegales）中它返回80行，它應該只返回一行（但每次它應該是一個不同的數字。

你知道我必須添加到子查詢以使其工作嗎？ 最重要的是，循環和程序的其余部分是正確的嗎？

提前致謝

Answer 1

您可以使用CTE更新一個語句中的所有行，如下所示。

;WITH T
     AS (SELECT IdDatoLegal,
                Row_number() OVER (ORDER BY IdCliente ) AS RN
         FROM   dbo.DatosLegales)
UPDATE T
SET    IdDatoLegal = RN 

Answer 2

UPDATE D
SET IdDatoLegal = RN 
FROM DatosLegales D JOIN 
 (
   SELECT IdCliente, Row_number() OVER (ORDER BY IdCliente) AS RN
   FROM   DatosLegales
 ) Temp
ON D.IdCliente = Temp.IdCliente