Corona 运行时错误"尝试连接字段'?' (一个空值)"

我在我的移动应用程序移交项目中有这个8个问题的调查。首先， Corona 没有提示我任何错误消息，应用程序运行得很好，但是当我添加了两个问题时，我开始收到此消息错误

[![enter image description here](https://i.stack.imgur.com/CIG2X.png)](https://i.stack.imgur.com/CIG2X.png)

我不确定错误为什么是"一个空值"，但我的代码看起来像这样。（第662到678行）

        function checkEBASComplete()
        local tempScore = 0
        for i = 1, 10 do
            print("EBAS:"..ebasRating_Arr[i])
            tempScore = tempScore + ebasRating_Arr[i]

            if (ebasRating_Arr[i] == -1) then
                ebasScore = 0
                ebasScore_text.text = "测试未完成"
            else
                ebasScore = tempScore
                ebasScore_text.text = tostring(ebasScore)
            end

        end

        tempScore = 0
    end

    checkEBASComplete()

我在第110行有这样的代码。我只是在后面添加了两个"-1"

local ebasRating_Arr = {-1,-1,-1,-1,-1,-1,-1,-1,-1,-1}

有人能帮我吗？感谢所有帮助:D

新问题------------------------------------------------------

[![enter image description here](https://i.stack.imgur.com/4MVux.png)](https://i.stack.imgur.com/4MVux.png)

这是我的代码从第705行到711行

function saveResults()

        local q = [[UPDATE EBAS_DEP SET rating1=']]..ebasRating_Arr[1] .. [[',rating2=']] .. ebasRating_Arr[2] .. [[',rating3=']] .. ebasRating_Arr[3] .. [[',rating4=']] .. ebasRating_Arr[4] .. [[',rating5=']] .. ebasRating_Arr[5] .. [[',rating6=']] .. ebasRating_Arr[6] .. [[',rating7=']] .. ebasRating_Arr[7] .. [[',rating8=']] .. ebasRating_Arr[8] .. [[',rating9=']] .. ebasRating_Arr[9] .. [[',rating10=']] .. ebasRating_Arr[10] .. [[',rating11=']] .. amtRating_Arr[1] .. [[',rating12=']] .. amtRating_Arr[2] .. [[',rating13=']] .. amtRating_Arr[3] .. [[',rating14=']] .. amtRating_Arr[4] .. [[',rating15=']] .. amtRating_Arr[5] .. [[',rating16=']] .. amtRating_Arr[6] .. [[',rating17=']] .. amtRating_Arr[7] .. [[',rating18=']] .. amtRating_Arr[8] .. [[',rating19=']] .. amtRating_Arr[9] .. [[',rating20=']] .. amtRating_Arr[10] .. [[',rating21=']] .. amtRating_Arr[11] .. [[',ebas_score=']] .. ebasScore ..[[',amt_score=']] .. amtScore ..  [['WHERE id=']].. _G.EBAS_ID..[[';]]
        db:exec( q )
        print(db:errcode(), db:errmsg())

    end