I encountered weird problem when trying to use Access Database file in my project.
在我的项目中使用Access数据库文件时遇到了奇怪的问题。
I have a table named 'CarGears'. When I add some rows to it, Visual Studio shows them at the start of the table, instead of putting it at the button.
我有一张桌子叫“CarGears”。当我向它添加一些行时，Visual Studio在表的开头显示它们，而不是将它放在按钮上。
I am including pics of the problem 
我正在把问题的图片包括在内
Any solution for it?
任何解决方案吗?
Thanks
谢谢
1 个解决方案
#1
2
Access is in fact sorting the table by the primary key, and thus is IS sorting the data every time.
访问实际上是按主键对表进行排序，因此每次都是对数据进行排序。
Most modern database systems consider all data un-ordered and you cannot assume order of data. The data is considered an un-ordered bucket of data. You can’t assume order since 5 users might be adding data, and now such order can’t be known since records can be added or removed by other users.
大多数现代数据库系统考虑所有数据的无序性，而不能假定数据的顺序。数据被认为是一组无序的数据。您不能假设order，因为5个用户可能正在添加数据，现在无法知道这个顺序，因为记录可以被其他用户添加或删除。
If you are using punched card computers, or reading a text file, you can assume order, but a database is not paper, not punched cards, and order of data can NEVER be assumed.
如果你使用穿孔卡片计算机，或者阅读文本文件，你可以假定顺序，但是数据库不是纸，不是穿孔卡片，而且数据的顺序是不能假定的。
Bottom line: If you want ordered data, then you query pull has to sort the data – any other assumption is NOT valid and cannot be assumed.
底线:如果您想要有序的数据，那么查询拉必须对数据进行排序——任何其他假设都是无效的，不能假设。
Access can sort 100,000 records with an index in about 1000th of a second or less – performance of such sorts is a non-issue, and even if it was, assumption of order cannot be assumed with a modern database system. This lesson and rule is usually the first day in any computer class that involves database theory.
访问可以对100,000个记录进行排序，在大约1000个秒或更少的情况下，这样的性能是一个不存在的问题，即使是这样，也不能假定一个现代数据库系统可以假定顺序。这一课和规则通常是任何涉及数据库理论的计算机类的第一天。
You are doomed in the use of computers and data processing if you ignore the above simple fact of computers and how database systems work.
如果您忽略了上述计算机的简单事实以及数据库系统的工作方式，那么您注定要使用计算机和数据处理。
#1
2
Access is in fact sorting the table by the primary key, and thus is IS sorting the data every time.
访问实际上是按主键对表进行排序，因此每次都是对数据进行排序。
Most modern database systems consider all data un-ordered and you cannot assume order of data. The data is considered an un-ordered bucket of data. You can’t assume order since 5 users might be adding data, and now such order can’t be known since records can be added or removed by other users.
大多数现代数据库系统考虑所有数据的无序性，而不能假定数据的顺序。数据被认为是一组无序的数据。您不能假设order，因为5个用户可能正在添加数据，现在无法知道这个顺序，因为记录可以被其他用户添加或删除。
If you are using punched card computers, or reading a text file, you can assume order, but a database is not paper, not punched cards, and order of data can NEVER be assumed.
如果你使用穿孔卡片计算机，或者阅读文本文件，你可以假定顺序，但是数据库不是纸，不是穿孔卡片，而且数据的顺序是不能假定的。
Bottom line: If you want ordered data, then you query pull has to sort the data – any other assumption is NOT valid and cannot be assumed.
底线:如果您想要有序的数据，那么查询拉必须对数据进行排序——任何其他假设都是无效的，不能假设。
Access can sort 100,000 records with an index in about 1000th of a second or less – performance of such sorts is a non-issue, and even if it was, assumption of order cannot be assumed with a modern database system. This lesson and rule is usually the first day in any computer class that involves database theory.
访问可以对100,000个记录进行排序，在大约1000个秒或更少的情况下，这样的性能是一个不存在的问题，即使是这样，也不能假定一个现代数据库系统可以假定顺序。这一课和规则通常是任何涉及数据库理论的计算机类的第一天。
You are doomed in the use of computers and data processing if you ignore the above simple fact of computers and how database systems work.
如果您忽略了上述计算机的简单事实以及数据库系统的工作方式，那么您注定要使用计算机和数据处理。