rows

MongoDB Database, equivalent for SELECT column1, column2 FROM tbl

由 狂风中的少年 提交于 2019-12-04 15:55:27
问题 From my MongoDB I want the equivalent for SELECT column1, column2 FROM tbl With this code I get all the 'rows' but also all the 'columns' DBCollection collection = database.getCollection("names"); DBCursor cursor = collection.find(); I for example would like all the 'rows' but only the 'columns': id, name, age How would I do this? Thanks for any help!! 回答1: db.collection.find({}, {_id: 1, name: 1, age: 1}) The first argument to find (the predicate) is your selection criteria, e.g. db

Select top N rows out of M groups

由 佐手、 提交于 2019-12-04 14:49:32
I have this table: CREATE TABLE IF NOT EXISTS `catalog_sites` ( `id` int(10) unsigned NOT NULL auto_increment, `cat_id` int(10) unsigned NOT NULL, `date` datetime NOT NULL, `url` varchar(255) NOT NULL, `title` varchar(255) NOT NULL, `description` varchar(255) NOT NULL, `keywords` varchar(255) NOT NULL, `visited` int(10) unsigned NOT NULL, `shown` int(10) unsigned NOT NULL, `meta_try` int(1) NOT NULL, PRIMARY KEY (`id`), UNIQUE KEY `url` (`url`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ; I think my problem is simple, but cant seem to find an appropriate solution.. So, this is a

jQuery $.live() doesn't work with table rows on the iPhone

由 被刻印的时光 ゝ 提交于 2019-12-04 14:37:20
I'm making table rows click-able with jQuery's $.live() function. Works perfectly on Chrome, Firefox and even desktop Windows Safari -- but not on the iPhone. $.bind() works everywhere, but for obvious reasons I'd like to use the other function. Does anyone have any idea why it doesn't work and how can I fix it? Example code below. <!DOCTYPE html> <html lang="en"> <head> <title>test</title> <meta charset="utf-8" /> <meta name="viewport" content="user-scalable=no,width=device-width" /> <meta name="apple-mobile-web-app-capable" content="yes" /> <style type="text/css">table { width: 100%; border

Checking duplicates, sum them and delete one row after summing

由 跟風遠走 提交于 2019-12-04 12:32:15
问题 I have a dataframe which contains some duplicates. I want to sum rows of two columns where there is a duplicate and then delete the unwanted row. Here is an example of the data, Year ID Lats Longs N n c_id 2015 200 30.5417 -20.5254 150 30 4142 2015 200 30.5417 -20.5254 90 50 4142 I want to sum columns N and n into one row. the rest of the information i.e. Lats , Longs , ID and Year is to remain the same e.g., Year ID Lats Long N n c_id 2015 200 30.5417 -20.5254 240 80 4142 回答1: Solution using

How to maintain selected rows in DataGridView when mouse is held down on a cell?

由 醉酒当歌 提交于 2019-12-04 12:24:25
I am trying to implement row moving in a DataGridView. I want to be able to select multiple rows and click on any of the selected row's cells to begin the drag operation. The problem is that the rows become deselected when I hold the mouse down on a cell. How can I prevent this from happening? From a quick Google search, this seems to a solution for custom drag-dropping of rows. Note I just ripped the following code from the linked page, I can't vouch for its effectiveness. private Rectangle dragBoxFromMouseDown; private int rowIndexFromMouseDown; private int rowIndexOfItemUnderMouseToDrop;

MySQL return all rows where a column contains any but only keywords from a set

由 五迷三道 提交于 2019-12-04 12:10:01
Is there a way to select rows where one of the column contains only , but any number of, predefined values? I've been using this, but it returns any rows where my column contains at least one of the values (which is exactly what it's suppose to do, I know). But I'm looking for a way to only select rows that have ONLY my keywords in the keyword column. SELECT * FROM `products`.`product` WHERE keywords LIKE '%chocolate%' AND keyword LIKE '%vanilla%'; Example Keywords: chocolate, sugar, milk, oats Using the above keywords, I would want the first two results returned, but not the last two:

Drag and drop rows in a jqgrid

由 拈花ヽ惹草 提交于 2019-12-04 11:41:33
I am trying a drag & drop option for rows in a jqgrid. I have tried with this fiddle . Thanks a lot for any valuable suggestions. I have tried with jQuery("#mytable").gridDnD(); and also with jQuery("#mytable").jqGrid('gridDnD'); I was having the same problem so I looked into your example. Made a few changes and now it seems to work. Include: jQuery UI.js as this is where the base jquery drag and drop code is. Include: jquery.tablednd.js Move the Dnd call and sortable rows calls to after you create the grid. Working fiddle: http://jsfiddle.net/netroworx/6wMm7/ $(document).ready(function() {

How to get row index number for particular name(s)?

由 别来无恙 提交于 2019-12-04 09:21:27
How can one determine the row index-numbers corresponding to particular row names? I have a vector of row names, and I would like to use these to obtain a vector of the corresponding row indices in a matrix. I tried row() and as.integer(rownames(matrix.object)) , but neither seems to work. In addition to which , you can look at match : m <- matrix(1:25, ncol = 5, dimnames = list(letters[1:5], LETTERS[1:5])) vec <- c("e", "a", "c") match(vec, rownames(m)) # [1] 5 1 3 Try which : which(rownames(matrix.object) %in% c("foo", "bar")) 来源： https://stackoverflow.com/questions/20663720/how-to-get-row

UICollectionView autosize and dynamic number of rows

由 谁都会走 提交于 2019-12-04 07:36:17
I am trying to do something like this: Basically, I am using a UICollectionView and the cells (3 diferent .xib ). So far, it works. The thing I want to do is: Set a autoheight If rotate, add 1 row to the UIColectionView 2.1 If tablet, on portrait will have 2 rows and landscape 3 rows. (which basically is the same of point 2, only adding 1 row. I have something like this: extension ViewController { override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator){ setSizeSize() } func setSizeSize(){ if(DeviceType.IS_IPAD || UIDevice.current.orientation =

Select unique random rows from SQL Server table but always duplicates

由 早过忘川 提交于 2019-12-04 06:28:10
问题 i am not the best with sql but i try my best to get my Problems done. I have a table "just" which is filled with Columns ( ID (PK, Identity), Char, Serv , Random ) . Now i want to select a random row from this table and insert it into the Table "f_WinGet". So far all my Procedures take this Step fine , but i always get Duplicates in the second table. First table : 84 rows Second table: needed 35 random out of 84. I have tried many other ways but i always get the same result. All my Procedure
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