Imagine a have a very long enunumeration, too big to reasonably 开发者_如何学运维convert to a list. Imagine also that I want to remove duplicates from the list. Lastly imagine that I know that only a
I want to write a query like this: For a table that has these columns: ColA ColB ColC, ColD select first(ColA, ColB, ColC, ColD)
I have this XML file, from which I\'d like to count the number of users referenced in it. But they can appear in more than one category, and I\'d like these duplicates not to be taken into account.
I am looking to do the following using an NHibernate Criteria Query I have \"Product\"s which has 0 to Many \"Media\"s
I have the database table logs as the following: alt text http://www.freeimagehosting.net/uploads/16e974703a.jpg
I have a table of all sales defined like: mysql> describe saledata; +-------------------+---------------------+------+-----+---------+-------+
I have a table with an ip address column. I would like to find the top five addresses which are listed.
I would like to select every column of a table, but want to have distinct values on a single attribute of my rows (City in the example). I don\'t want extra columns like counts or anything, just a lim
Hi have an issue with Linq. I have an array of double values with duplicate entri开发者_JAVA技巧es. I want to extract only distinct values from it. I have the following code which doesn\'t work correc
I have a collection of objects which have several properties in each of them.I often need to get a list of distinct values for many properties in this collection. If I implement IEqualityComparer on t
加载中,请稍侯......