本文介绍了选择最大发票号码的问题。用SQL查询...的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 29岁程序员,3月因学历无情被辞! 当我运行此查询时: - 从BillDetails中选择max(BillNo),左边(BillNo,6)='13-14 /' 它只返回'13 -14/9'但我有账单 - 没有'13 -14/10'(这是最大值).. 我的账单没有这样的模式: - '13 -14/1' '13 -14/2' '13 -14/3' ..... '13 -14/10' 如何获得最高账单没有相同年份('13 -14 /')???? 我正在使用MSAccess作为数据库.. 感谢高级.. 问候: Jayanta .. 解决方案 尝试: SELECT TOP 1 BillNo FROM BillDetails WHERE BillNo LIKE ' 13-14 /%' ORDER BY CAST(SUBSTRING(BillNo) , 7 , 999 ) AS INT ) 您正在尝试根据解析字符串获取最大帐单编号。 结果,你不会得到确切的值,因为1和10在字符串中的比较不同。 您可以解析账单否如上所述,然后将该数字转换为整数以获得最大值。 When i run this query :-select max(BillNo) from BillDetails where left(BillNo,6)='13-14/'It's return only '13-14/9' but I have bill-no this '13-14/10'(which is maximum)..My Bill No pattern like :-'13-14/1''13-14/2''13-14/3'.....'13-14/10'How to get maximum bill no of a same years('13-14/')????I'm Using MSAccess as a Database..Thanks in Advanced..Regards:Jayanta.. 解决方案 Try:SELECT TOP 1 BillNo FROM BillDetails WHERE BillNo LIKE '13-14/%' ORDER BY CAST(SUBSTRING(BillNo, 7, 999) AS INT)You are trying to get the maximum bill number based on parsing a string.As a result, you wont get the exact value since 1 and 10 are compared differently in string.You could parse the bill no as above and then convert that number to integer to get the maximum value. 这篇关于选择最大发票号码的问题。用SQL查询...的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 上岸,阿里云!
08-13 21:24