子查询返回的值超过1。当子查询遵循=，！=，<, <= , >，> =或当子查询用作

Question

时，我不允许这种查询，但是，当我从C#执行它时，出现一个错误消息，说

“子查询返回大于1倍的值。这是不允许的 当子查询跟随=，！=，<，< =，>，> =，或当子查询用作 表达”。

这里是我的代码：

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 

Answer 1

尝试修改这些声明：

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

​​

我觉得从他们身上了错误，你期望一个结果之后=但他们中的一个归来不止一个结果