大约有 44,000 项符合查询结果(耗时:0.0417秒) [XML]

https://stackoverflow.com/ques... 

How to use DISTINCT and ORDER BY in same SELECT statement?

..., and use a GROUP BY to make the DISTINCT work. Try something like this: SELECT DISTINCT Category, MAX(CreationDate) FROM MonitoringJob GROUP BY Category ORDER BY MAX(CreationDate) DESC, Category share | ...
https://stackoverflow.com/ques... 

Changing the background drawable of the searchview widget

...you can do with background of items in ActionBar dropdown. This is because selectableItemBackground is listed as styleable in R.stylable, whereas searchViewTextField (theme attribute that we're interested in) is not. Thus, we cannot access it easily from within XML resources (you'll get a No resourc...
https://stackoverflow.com/ques... 

Are “while(true)” loops so bad? [closed]

...// do something with the line } And in C, it's #include <stdio.h> char* buffer = NULL; size_t buffer_size; size_t size_read; while( (size_read = getline(&buffer, &buffer_size, stdin)) != -1 ){ // do something with the line } free(buffer); or if you're convinced you know how long...
https://stackoverflow.com/ques... 

How to get a one-dimensional scalar array as a doctrine dql query result?

...as callback, instead of writing a closure. $result = $em->createQuery("SELECT a.id FROM Auction a")->getScalarResult(); $ids = array_map('current', $result); See Petr Sobotka's answer below for additional info regarding memory usage. PHP >= 5.5 As jcbwlkr's answered below, the rec...
https://stackoverflow.com/ques... 

How to set Default Controller in asp.net MVC 4 & MVC 5

... Way : You simple follow below steps, 1) Right click on your Project 2) Select Properties 3) Select Web option and then Select Specific Page (Controller/View) and then set your login page Here, Account is my controller and Login is my action method (saved in Account Controller) Please take a l...
https://stackoverflow.com/ques... 

How to get Spinner value?

In Android, I am trying to get the selected Spinner value with a listener. 7 Answers 7...
https://stackoverflow.com/ques... 

How to get a value of an element by name instead of ID

... Use the name attribute selector: $("input[name=nameGoesHere]").val(); share | improve this answer | follow ...
https://stackoverflow.com/ques... 

Entity Framework is Too Slow. What are my options? [closed]

...uct product = db.Products.SingleOrDefault(p => p.Id == 10); // executes SELECT * FROM Products WHERE Id = 10 ProductDto dto = new ProductDto(); foreach (Category category in product.Categories) // executes SELECT * FROM Categories WHERE ProductId = 10 { dto.Categories.Add(new CategoryDto { N...
https://stackoverflow.com/ques... 

How to update column with null value

...Hello'); UPDATE your_table SET your_column = NULL WHERE some_id = 1; SELECT * FROM your_table WHERE your_column IS NULL; +---------+-------------+ | some_id | your_column | +---------+-------------+ | 1 | NULL | +---------+-------------+ 1 row in set (0.00 sec) ...
https://stackoverflow.com/ques... 

How to get first record in each group using Linq

...roup element by element.F1 into groups select groups.OrderBy(p => p.F2).First(); share | improve this answer | follow |...