MS SQL存储过程运行时错误

Question

如何在连接MSSQL查询时纠正sp中的错误？

SET  @Ws_Sql = 'SELECT CONVERT(VARCHAR(25),@WS_STATUS) AS [Status],A.RECNUB AS [Rec #], A.REVCOD AS [Revenue CODE], ' 
IF @LNKOPT = 1 
BEGIN
    SET  @Ws_Sql = @WS_SQL +''' AS [Status],'
END
ELSE IF @LNKOPT = 2
BEGIN
    SET  @Ws_Sql = @WS_SQL +'' + 'Modified' + ' AS [Status],'
END
ELSE IF @LNKOPT = 3
BEGIN
    SET  @Ws_Sql = @WS_SQL +'' + 'Deleted' + ' AS [Status],'
END
ELSE IF @LNKOPT = 4
BEGIN
    SET  @Ws_Sql = @WS_SQL +'' + 'Reprint' + ' AS [Status],'
END

Answer 1

您是否尝试将空值分配给[状态]输出列，以防@LNKOPT = 1？

在这种情况下，你需要使用双撇号来逃避撇号字符：

IF @LNKOPT = 1 
BEGIN
    SET  @Ws_Sql = @WS_SQL +''''' AS [Status],'
END

将导致@Ws_Sql包含：'' AS [Status]（否则会导致' AS [Status]，这会在执行@Ws_Sql字符串时出错。