如何在 SQL Server 2012 中创建选择，然后更新存储过程

Question

我正在尝试创建一个存储过程，它运行一个选择查询并提取一个 id（变量），然后对该 id 进行更新查询。任何帮助将不胜感激。

这就是我所拥有的：

CREATE PROCEDURE dbo.Lead_usp_getLead
    @LeadId int output
AS

   SELECT TOP 1  
       Leadid, LeadInitials, LeadFirstName, LeadSurname, 
       LeadHomeTelephoneNumber, LeadWorkTelephoneNumber,
       LeadCellularNumber, LeadEMailAddress, IsLocked, uploadedDate
   FROM 
       dbo.Lead
   WHERE 
       IsLocked = 'False'
   ORDER BY 
       uploadedDate;

   UPDATE dbo.Lead
   SET IsLocked = 'TRUE'
   WHERE LeadId = @LeadId

   DECLARE @leadid int

   EXEC dbo.Lead_usp_getLead @leadId;

Answer 1

您可以将它们组合起来。无需进行两次查询：

with toupdate as (
      SELECT TOP 1 l.*
      FROM dbo.Lead l
      WHERE l.IsLocked = 'False'
      ORDER BY l.uploadedDate
     )
Update toupdate
    SET IsLocked = 'TRUE';

Answer 2

不明白你的最终结果，但是：

UPDATE dbo.Lead SET IsLocked = 'TRUE'
WHERE Leadid = (SELECT TOP 1 Leadid FROM dbo.Lead WHERE IsLocked = 'False')

Answer 3

如果创建存储过程的唯一目的是运行选择查询并提取 id（变量）并且不包含其他复杂的业务逻辑..那么您应该编写一个函数：

IF OBJECT_ID (N'dbo.Lead_fn_getLead', N'FN') IS NOT NULL
    DROP FUNCTION dbo.Lead_fn_getLead;
GO

CREATE FUNCTION dbo.Lead_fn_getLead (@LeadId int)
RETURNS int
AS
BEGIN 
   DECLARE @varLeadId int

   SELECT TOP 1  @varLeadId =  
       Leadid
   FROM 
       dbo.Lead
   WHERE 
       IsLocked = 'False'
   ORDER BY 
       uploadedDate;

 RETURN(@varLeadId);
END;
Go

然后写 as 来更新表：

DECLARE @leadid int
SET @leadid = 1

UPDATE dbo.Lead
SET IsLocked = 'TRUE'
WHERE LeadId = (Select dbo.Lead_fn_getLead(@leadid))

Go

Check demo here..