在SQL中將文本轉換爲INT

Question

sm_Value是一個TEXT列，我需要將其轉換爲INT。

作爲一個事實，即只有兩個人會亂用這個表中，列將是數值（幽默我）

我收到此錯誤信息：

消息206，級別16，狀態2，過程User_Password_Date_Interval_Check，10號線
操作數類型衝突：文本與詮釋

不相容我曾嘗試：

SELECT CONVERT(INT, sm_Value)) 
FROM Setting_Misc 

但我仍然得到錯誤。

IF EXISTS (SELECT * FROM sysobjects 
      WHERE type = 'P' AND name = 'User_Password_Date_Interval_Check') 
BEGIN 
    PRINT 'Dropping Procedure User_Password_Date_Interval_Check' 
    DROP Procedure User_Password_Date_Interval_Check 
END 
GO 

PRINT 'Creating Procedure User_Password_Date_Interval_Check' 
GO 

CREATE Procedure User_Password_Date_Interval_Check 
    @ua_pk uniqueidentifier 
AS 
    DECLARE @PasswordExpireDays INT 

    SELECT 
     CONVERT(INT, CONVERT(VARCHAR(MAX), sm_Value)) 
    FROM Setting_Misc 

    SELECT 
     @PasswordExpireDays = COALESCE(sm_Value,0) 
    FROM 
     Setting_Misc AS sm 
    INNER JOIN 
     Syndicates As syn ON sm.syn_fk = syn.syn_pk 
    INNER JOIN 
     Company As c ON c.syn_fk = syn.syn_pk 
    INNER JOIN 
     User_Accounts As ua ON ua.c_fk = c.c_pk 
    WHERE 
     sm.sm_Setting = 'PasswordExpireDays' 
GO 

GRANT EXEC ON User_Password_Date_Interval_Check TO WEB 

Answer 1

您必須在設置變量的位置進行轉換。

IF EXISTS (SELECT * FROM sysobjects 
      WHERE type = 'P' AND name = 'User_Password_Date_Interval_Check') 
BEGIN 
    PRINT 'Dropping Procedure User_Password_Date_Interval_Check' 
    DROP Procedure User_Password_Date_Interval_Check 
END 
GO 

PRINT 'Creating Procedure User_Password_Date_Interval_Check' 
GO 

CREATE Procedure User_Password_Date_Interval_Check 
    @ua_pk uniqueidentifier 
AS 
    DECLARE @PasswordExpireDays INT 
    --This conversion doesn't cascade down to the next SELECT statement 
    SELECT 
     CONVERT(INT, CONVERT(VARCHAR(MAX), sm_Value)) 
    FROM Setting_Misc 

    SELECT 
     --Here is what has to change 
     --@PasswordExpireDays = COALESCE(sm_Value,0) 
      @PasswordExpireDays = CONVERT(INT, CONVERT(VARCHAR(MAX), sm_Value)) 
    FROM 
     Setting_Misc AS sm 
    INNER JOIN 
     Syndicates As syn ON sm.syn_fk = syn.syn_pk 
    INNER JOIN 
     Company As c ON c.syn_fk = syn.syn_pk 
    INNER JOIN 
     User_Accounts As ua ON ua.c_fk = c.c_pk 
    WHERE 
     sm.sm_Setting = 'PasswordExpireDays' 
GO 

GRANT EXEC ON User_Password_Date_Interval_Check TO WEB