Question

;with CTEima(PersonId,IsEmployeeActive)
as
(select count(*)
 from   custom.viwSSAppsEmpMasterExtended vem
 where  vem.SupervisorPersonId = @p_PersonId

 union all

 select CTEima.IsEmployeeActive
 from   Custom.viwSSAppsEmpMasterExtended vem
 join   CTEima on CTEima.PersonId = vem.SupervisorPersonId
 )
set @v_IsManager = (select count(*)from CTEima where IsEmployeeActive = 'Y')

这里我得到的错误就像关键字'set'

附近的语法不正确

告诉我如何将CTE中的值设置为变量

Answer 1

您无法在SET语句中使用SELECT关键字设置值。您可以将查询中的字段分配给SELECT语句中的变量：

WITH CTE AS (
  /** .. Your Query Here .. **/
)
SELECT
  @YourVariable = FieldNameOrSubquery -- In short: Expression
FROM
  CTE

在这种情况下，SELECT列表中的所有文件都应该分配给变量！

或者您可以通过SELECT关键字将单行 - 单列 SET语句的结果分配给变量：

SET @YourVariable = (SELECT COUNT(1) FROM YourTable).

您无法混合上述选项。

此外，CTE在单个SELECT，INSERT，UPDATE或DELETE语句的执行范围内定义。（http://msdn.microsoft.com/en-us/library/ms175972.aspx）。 SET不是SELECT / INSERT / UPDATE / DELETE语句，这就是SQL Server报告语法错误的原因（CTE无法在SET语句的范围。）

您的示例查询解决方案

;WITH CTEima(PersonId,IsEmployeeActive) AS
( SELECT COUNT(*)
  FROM   custom.viwSSAppsEmpMasterExtended vem
  WHERE  vem.SupervisorPersonId = @p_PersonId

  UNION ALL

  SELECT CTEima.IsEmployeeActive
  FROM   Custom.viwSSAppsEmpMasterExtended vem
  JOIN   CTEima on CTEima.PersonId = vem.SupervisorPersonId
)
SELECT @v_IsManager = COUNT(*)
FROM CTEima
WHERE IsEmployeeActive = 'Y'

Answer 2

用这个替换你的最后一行：

select @v_IsManager = count(*) from CTEima where IsEmployeeActive = 'Y'

Answer 3

;with CTEima(PersonId,IsEmployeeActive)
as
(select count(*)
 from   custom.viwSSAppsEmpMasterExtended vem
 where  vem.SupervisorPersonId = @p_PersonId

 union all

 select CTEima.IsEmployeeActive
 from   Custom.viwSSAppsEmpMasterExtended vem
 join   CTEima on CTEima.PersonId = vem.SupervisorPersonId
 )
 select @v_IsManager = count(*) from CTEima where IsEmployeeActive = 'Y'

Answer 4

DECLARE @a int SET @A = 1234 ; 与CTE AS（选择 COL1， COL2 来自xyz

在哪里Col1 = @A）， DT AS（选择 @A Col1）

选择 * 从dt d LEFT JOIN CTE vd ON vd.col1 = d.col1

如何将cte值赋给变量

4 个答案: