sql - 动态查询中 select 语句中的空格

Question

我有一个像这样的动态查询:

SET @str_Query = 'SELECT SIM.Item_ID,
                  SIM.Item_Description,
                  SU.Short_Description AS Unit,
                  SIM.Std_Lead_Time,'+
                  '' ''+' AS Last_Purchase_Rate
                  FROM  FKMS_Item_Master AS SIM
                        INNER JOIN FKMS_STP_Units SU
                        ON SIM.Item_Purchase_Unit=SU.Unit_Id' +
                 ' WHERE ' + @str_Condition + 
                            ' AND SIM.Location_Id =' + CAST(@aint_Location_Id AS VARCHAR(10)) +
                            ' AND SIM.Item_Deleted =0 
                              AND SIM.Approved_On IS NOT NULL'  
                +' ORDER BY SIM.Item_Description'   

我想按 Last_Purchase_Rate 检索空间

“''''+”AS Last_Purchase_Rate 部分显示语法错误 当我执行这个查询时。 如果我打印这个动态查询，查询似乎是正确的。它显示为 AS Last_Purchase_Rate，AS 之前有空格。请帮忙。

Answer 1

我会写

...SIM.Std_Lead_Time, '' '' AS Last_Purchase_Rate...

而不是

...SIM.Std_Lead_Time,'+'' ''+' AS Last_Purchase_Rate...