Question

SELECT   Ticket_no, journey_date, Travels, route, sel_seat, 
         seat_opt, net_pay, name, mob, book_date, PNR_no 
FROM     a1_ticket 
WHERE    (CONVERT, GETDATE(),'-') AS [DD-Mon-YYYY], journey_date) >=journey_date1 
  AND    (CONVERT, GETDATE(),'-') AS [DD-Mon-YYYY], journey_date) <=journey_date2  
ORDER BY PNR_no DESC

Answer 1

您不能在where子句

中使用AS

Answer 2

你的where子句很奇怪。也许你想要这样的东西。

SELECT   Ticket_no, journey_date, Travels, route, sel_seat, 
         seat_opt, net_pay, name, mob, book_date, PNR_no 
FROM     a1_ticket 
WHERE    journey_date between @journey_date1 and @journey_date2  
ORDER BY PNR_no DESC

Answer 3

journey_date1和journey_date2是否真的在同一记录中？这会很奇怪。否则，参数/变量使用@符号，例如@journey_date1
CONVERT语法应为CONVERT(<target type>, <column|expression>, <optional format>)
不要转换表格的列。相反，始终将要测试的参数与日期进行转换以使用索引
与datetime列相比，datetime参数无需转换。要指定日期文字，为了健壮性，请始终使用YYYYMMDD，但如果可能的话，请使用前端的参数化查询，这甚至不需要任何格式化。

看起来您的查询应该是这样的

SELECT   Ticket_no, journey_date, Travels, route, sel_seat, 
         seat_opt, net_pay, name, mob, book_date, PNR_no 
FROM     a1_ticket 
WHERE    journey_date >= @journey_date1 
  AND    journey_date <= @journey_date2  
ORDER BY PNR_no DESC

这个SELECT查询有什么问题？

3 个答案: