子查询返回超过 1 个值。当子查询跟随 =、!=、<、<=、>、>= 或子查询用作

【问题标题】：Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as子查询返回超过 1 个值。当子查询跟随 =、!=、<、<=、>、>= 或子查询用作
【发布时间】：2016-03-02 05:15:34
【问题描述】：

我有以下SQL 查询，但是，当我从C# 执行它时，我收到一个错误提示

"子查询返回超过 1 个值。当 子查询遵循 =、!=、、>= 或当子查询用作 一个表达式。”

这是我的代码：

    CREATE PROC spAddEmployee
(
    @empEmail AS VARCHAR(MAX),
    @empLastName AS VARCHAR(MAX),
    @empFirstName AS VARCHAR(MAX),
    @empMgrEmail AS VARCHAR(MAX),
    @projId AS INT,
    @projName AS VARCHAR(MAX),
    @projStatus AS VARCHAR(MAX),
    @projMgr AS VARCHAR(MAX),
    @pdRole AS VARCHAR(MAX),
    @pdShift AS VARCHAR(MAX),
    @pdAccount AS VARCHAR(MAX),
    @pdLvl AS VARCHAR(MAX),
    @pdStatus AS VARCHAR(MAX),
    @projMonth AS VARCHAR(MAX),
    @projYear AS VARCHAR(MAX),
    @projReqFte AS DECIMAL
)
AS
BEGIN
    --Check if the employee already existed.
    DECLARE @isEmpEmailMatch VARCHAR(MAX)
    SET @isEmpEmailMatch = (SELECT COUNT(*) FROM Employees WHERE Emp_Email=@empEmail)
    --Check if the project already existed.
    DECLARE @isProjIdMatch VARCHAR(MAX)
    SET @isProjIdMatch = (SELECT COUNT(*) FROM Projects WHERE Proj_Id=@projId)

    IF @isEmpEmailMatch < 1
        BEGIN
            --Insert data to employees table.
            INSERT INTO Employees (Emp_Email, Emp_LastName, Emp_FirstName, Emp_MgrName, Emp_Created_On, Emp_Updated_At) 
            VALUES (@empEmail, @empLastName, @empFirstName, @empMgrEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)

            --Insert data to Employee FTE Allocation Total
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Nov', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Dec', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Jan', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Feb', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Mar', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Apr', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('May', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Jun', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Jul', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Aug', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Sep', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Oct', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)

            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Nov', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Dec', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Jan', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Feb', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Mar', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Apr', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('May', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Jun', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Jul', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Aug', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Sep', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
            INSERT INTO Employee_FTE_Allocation_Total (ET_FTE_Month, ET_FTE_Year, ET_FTE_Req, Emp_Email, ET_FTE_Created_On, ET_FTE_Updated_At)
            VALUES ('Oct', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @empEmail, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
        END

    IF @isProjIdMatch < 1
        BEGIN
            --Insert data to Projects table.
            INSERT INTO Projects (Proj_Id, Proj_Name, Proj_Status, Proj_MgrName, Proj_Created_On, Proj_Updated_At) 
            VALUES (@projId, @projName, @projStatus, @projMgr, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)

            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Jan', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Feb', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Mar', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Apr', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('May', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Jun', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Jul', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Aug', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Sep', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Oct', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Nov', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Dec', CAST(YEAR(GETDATE()) AS VARCHAR(MAX)), 0, @projId)

            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Jan', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Feb', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Mar', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Apr', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('May', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Jun', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Jul', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Aug', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Sep', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Oct', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Nov', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
            INSERT INTO Project_FTE_Allocation_Total (PT_FTE_Month, PT_FTE_Year, PT_FTE_Req, Proj_Id)
            VALUES ('Dec', CAST(YEAR(GETDATE()) + 1 AS VARCHAR(MAX)), 0, @projId)
        END

    -- Insert data to Project Details table.
    INSERT INTO Project_Details (Proj_Id, PD_Role, PD_Level, PD_AccountName, PD_Shift, PD_Status, PD_Created_On, PD_Updated_At)
    VALUES (@projId, @pdLvl, @pdRole, @pdAccount, @pdShift, @pdStatus, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)

    --Get the last inserted Project Detail table.
    DECLARE @lastPDId INT
    SET @lastPDId = (SELECT TOP 1 PD_Id FROM Project_Details ORDER BY PD_Id DESC)

    --Insert data to Project FTE Allocation table.
    INSERT INTO Project_FTE_Allocation (P_FTE_Month, P_FTE_Year, P_FTE_Req, PD_Id, P_FTE_Created_On, P_FTE_Updated_At)
    VALUES (@projMonth, @projYear, @projReqFte, @lastPDId, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)

    DECLARE @projCurrentTotalFte DECIMAL
    SET @projCurrentTotalFte = (SELECT PT_FTE_Req FROM Project_FTE_Allocation_Total WHERE Proj_Id=@projId AND PT_FTE_Month=@projMonth AND 
    PT_FTE_Year=@projYear)

    DECLARE @projUpdatedTotalFte DECIMAL
    SET @projUpdatedTotalFte = @projCurrentTotalFte + @projReqFte

    UPDATE Project_FTE_Allocation_Total SET PT_FTE_Req=@projUpdatedTotalFte WHERE Proj_Id=@projId AND PT_FTE_Month=@projMonth AND 
    PT_FTE_Year=@projYear

    --Insert data to Employee FTE Allocation Breakdown table.
    INSERT INTO Employee_FTE_Allocation_Breakdown (EB_FTE_Month, EB_FTE_Year, EB_FTE_Req, EB_FTE_Created_On, EB_FTE_Updated_At)
    VALUES (@projMonth, @projYear, @projReqFte, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)

    DECLARE @highestEBFTEId INT
    SET @highestEBFTEId = (SELECT TOP 1 EB_FTE_Id FROM Employee_FTE_Allocation_Breakdown ORDER BY EB_FTE_Id DESC)

    DECLARE @getRoleId INT
    SET @getRoleId = (SELECT Role_Id FROM Roles WHERE Role_Name=@pdLvl)

    DECLARE @getLvlId INT
    SET @getLvlId = (SELECT Level_Id FROM Levels WHERE Level_Name=@pdRole)

    DECLARE @getShiftId INT
    SET @getShiftId = (SELECT Shift_Id FROM Shifts WHERE Shift_Name=@pdShift)

    DECLARE @isEmployeeAssignMatch VARCHAR(MAX)
    SET @isEmployeeAssignMatch = (SELECT COUNT(*) FROM Assignments WHERE Emp_Email=@empEmail AND Proj_Id=@projId AND PD_Id=@lastPDId AND EB_FTE_Id=@highestEBFTEId
    AND Role_Id=@getRoleId AND Level_Id=@getLvlId AND Shift_Id=@getShiftId)

    IF @isEmployeeAssignMatch < 1
        BEGIN
            INSERT INTO Assignments (Emp_Email, Proj_Id, PD_Id, EB_FTE_Id, Role_Id, Level_Id, Shift_Id, Assign_Created_On, 
            Assign_Updated_At) VALUES (@empEmail, @projId, @lastPDId, @highestEBFTEId, @getRoleId, @getLvlId, @getShiftId, CURRENT_TIMESTAMP
            , CURRENT_TIMESTAMP)
        END

    DECLARE @currentFte DECIMAL
    SET @currentFte = (SELECT ET_FTE_Req FROM Employee_FTE_Allocation_Total WHERE ET_FTE_Month=@projMonth AND ET_FTE_Year=@projYear AND 
    Emp_Email=@empEmail)

    DECLARE @updatedFte DECIMAL
    SET @updatedFte = @currentFte + @projReqFte

    UPDATE Employee_FTE_Allocation_Total SET ET_FTE_Req=@updatedFte WHERE ET_FTE_Month=@projMonth AND ET_FTE_Year=@projYear AND 
    Emp_Email=@empEmail

    DECLARE @projFTEId INT
    SET @projFTEId = (SELECT P_FTE_Id FROM Project_FTE_Allocation WHERE PD_Id=@lastPDId AND P_FTE_Month=@projMonth AND P_FTE_Year=@projYear)

    DECLARE @projCurrentFte DECIMAL
    SET @projCurrentFte = (SELECT P_FTE_Req FROM Project_FTE_Allocation WHERE P_FTE_Id=@projFTEId)

    DECLARE @multipliedFte DECIMAL
    SET @multipliedFte = @projReqFte * -1.0

    DECLARE @projUpdatedFte DECIMAL
    SET @projUpdatedFte = @projCurrentFte + @multipliedFte

    UPDATE Project_FTE_Allocation SET P_FTE_Req=@projUpdatedFte WHERE P_FTE_Id=@projFTEId

    DECLARE @projTotalCurrentFte DECIMAL
    SET @projTotalCurrentFte = (SELECT PT_FTE_Req FROM Project_FTE_Allocation_Total WHERE Proj_Id=@projId AND PT_FTE_Month=@projMonth AND 
    PT_FTE_Year=@projYear)

    DECLARE @projTotalUpdatedFte DECIMAL
    SET @projTotalUpdatedFte = @projTotalCurrentFte + @multipliedFte

    UPDATE Project_FTE_Allocation_Total SET PT_FTE_Req=@projTotalUpdatedFte WHERE Proj_Id=@projId AND PT_FTE_Month=@projMonth AND 
    PT_FTE_Year=@projYear

END

【问题讨论】：

  • 所以？问题是什么？
  • 问题在于set @foo = (select ... from ... where ...) 语句之一。这些选择语句之一返回了多个记录，这就是错误的原因。
  • 所以，试着从像top 1 这样的查询中只得到一个结果，你只有两条语句需要这样做：SET @projCurrentTotalFte = (SELECT PT_FTE_Req FROM Project_FTE_Allocation_Total WHERE Proj_Id=@projId AND PT_FTE_Month=@projMonth AND PT_FTE_Year=@projYear) 和 DECLARE @projTotalCurrentFte DECIMAL SET @projTotalCurrentFte = (SELECT PT_FTE_Req FROM Project_FTE_Allocation_Total WHERE Proj_Id=@projId AND PT_FTE_Month=@projMonth AND PT_FTE_Year=@projYear)
  • 您知道您可以通过设置日历表并从中进行选择来删除所有这些INSERT 语句。当 C# 程序员编写存储过程时......

标签： c# sql sql-server stored-procedures


【解决方案1】：

尝试修改这些语句：

DECLARE @projCurrentTotalFte DECIMAL
SET @projCurrentTotalFte = (SELECT PT_FTE_Req FROM Project_FTE_Allocation_Total WHERE Proj_Id=@projId AND PT_FTE_Month=@projMonth AND 
PT_FTE_Year=@projYear)

和

DECLARE @currentFte DECIMAL
SET @currentFte = (SELECT ET_FTE_Req FROM Employee_FTE_Allocation_Total WHERE ET_FTE_Month=@projMonth AND ET_FTE_Year=@projYear AND 
Emp_Email=@empEmail)

我认为错误来自他们，您希望在 = 之后有一个结果，但其中一个返回多个结果

【讨论】：

    猜你喜欢
    • 2013-04-29
    • 2013-05-10
    • 1970-01-01
    • 1970-01-01
    • 2021-11-06
    • 1970-01-01
    • 1970-01-01
    • 2012-06-04
    相关资源
    最近更新 更多
    热门标签
    Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode