在SQL中将文本转换为INT

Question

sm_Value是一个TEXT列，我需要将其转换为INT。

作为一个事实，即只有两个人会乱用这个表中，列将是数值（幽默我）

我收到此错误信息：

消息206，级别16，状态2，过程User_Password_Date_Interval_Check，10号线
操作数类型冲突：文本与诠释

不相容我曾尝试：

SELECT CONVERT(INT, sm_Value)) 
FROM Setting_Misc 

但我仍然得到错误。

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

您必须在设置变量的位置进行转换。

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