Question

我的查询如下：

SELECT 
ID,Bill_typeID,Cust_ID,Name,Reg_date,Account_Number,Amount,status
 FROM
(
 SELECT ID,Bill_typeID,Cust_ID,Name,Reg_date,Account_Number,Amount,status FROM Cust_Bill_Reg_M_Tbl 
 UNION ALL
 SELECT ID,Bill_typeID,Cust_ID,Name,Reg_date,Account_Number,Amount,status FROM Rail_Ticket_Booking_M_Tbl 
)
order by CONVERT(datetime, Reg_date, 101) desc

我收到了这个错误。

Msg 156, Level 15, State 1, Line 9
Incorrect syntax near the keyword 'order'.

我的查询有什么问题？如果错了，实际方法是什么？任何帮助将不胜感激。

Answer 1

您需要为派生表（tmp）设置别名：

SELECT  
ID,Bill_typeID,Cust_ID,Name,Reg_date,Account_Number,Amount,status 
 FROM 
( 
 SELECT ID,Bill_typeID,Cust_ID,Name,Reg_date,Account_Number,Amount,status FROM Cust_Bill_Reg_M_Tbl  
 UNION ALL 
 SELECT ID,Bill_typeID,Cust_ID,Name,Reg_date,Account_Number,Amount,status FROM Rail_Ticket_Booking_M_Tbl  
) tmp
order by CONVERT(datetime, Reg_date, 101) desc

Answer 2

您需要为子查询命名，例如使用x：

SELECT 
ID,Bill_typeID,Cust_ID,Name,Reg_date,Account_Number,Amount,status
 FROM
(
 SELECT ID,Bill_typeID,Cust_ID,Name,Reg_date,Account_Number,Amount,status FROM Cust_Bill_Reg_M_Tbl 
 UNION ALL
 SELECT ID,Bill_typeID,Cust_ID,Name,Reg_date,Account_Number,Amount,status FROM Rail_Ticket_Booking_M_Tbl 
) x
order by CONVERT(datetime, Reg_date, 101) desc

Answer 3

您需要在子查询中添加别名，如下所示：

SELECT 
  ID,
  Bill_typeID,
  Cust_ID,
  Name,
  Reg_date,
  Account_Number,
  Amount,status
FROM
(
  SELECT 
    ID,
    Bill_typeID,
    Cust_ID,Name,
    Reg_date,
    Account_Number,
    Amount,
    status 
  FROM Cust_Bill_Reg_M_Tbl 
  UNION ALL
  SELECT 
    ID,
    Bill_typeID,
    Cust_ID,
    Name,
    Reg_date,
    Account_Number,
    Amount,
    status 
  FROM Rail_Ticket_Booking_M_Tbl 
) Alias
order by CONVERT(datetime, Reg_date, 101) desc

UNION ALL sql查询中的order by子句

3 个答案: