大约有 15,000 项符合查询结果（耗时：0.0121秒） [XML]
nvarchar(max) vs NText
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Wanted to add my experience with converting. I had many text fields in ancient Linq2SQL code. This was to allow text columns present in indexes to be rebuilt ONLINE.
First I've known about the benefits for years, but always assumed that converting would mea...
Get a list of distinct values in List
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Not before the Distinct() but after, if you are trying to convert to a list. Ex: Notes.Select(x => x.Author).Distinct().ToList();
– MTwiford
Apr 4 '17 at 20:03
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What is the most efficient/elegant way to parse a flat table into a tree?
...AS (
SELECT [Node].[Id]
, [Node].[ParentId]
, 0 AS [Level]
, CONVERT([varchar](MAX), [Node].[Order]) AS [Order]
FROM [Node]
WHERE [Node].[ParentId] = 0
UNION ALL
SELECT [Node].[Id]
, [Node].[ParentId]
, [NodeList].[Level] + 1 AS [Level]
, [NodeList].[Order] + '|'
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How to select/get drop down option in Selenium 2
I am converting my selenium 1 code to selenium 2 and can't find any easy way to select a label in a drop down menu or get the selected value of a drop down. Do you know how to do that in Selenium 2?
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Create a matrix of scatterplots (pairs() equivalent) in ggplot2
...ykey = '.ykey', yvalue = '.yvalue',
na.rm = FALSE, convert = FALSE, factor_key = FALSE) {
vars <- quos(...)
xkey <- enquo(xkey)
xvalue <- enquo(xvalue)
ykey <- enquo(ykey)
yvalue <- enquo(yvalue)
data %>% {
cbind(gather(., key = !!xkey, valu...
How do I convert a dictionary to a JSON String in C#?
I want to convert my Dictionary<int,List<int>> to JSON string. Does anyone know how to achieve this in C#?
13...
Format number to 2 decimal places
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@UncleIroh, No I think he actuallyy means convert(2229.999 as decimal(4,2)).
– Pacerier
Apr 28 '15 at 6:58
3
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Select mySQL based only on month and year
... It is index friendly, but strtotime gives you int and you need to convert it to date for mysql first.
– piotrm
Feb 1 '12 at 23:26
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Get Character value from KeyCode in JavaScript… then trim
...r example, http://www.utf8-chartable.de/). However, those are hex values, converting to decimal gives us a charcode of 65 for "A" and 97 for "a".[1] This is consistent with what we get from String.fromCharCode for these values.
My own requirement was limited to processing numbers and ordinary let...
MySQL: selecting rows where a column is null
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I had the same issue when converting databases from Access to MySQL (using vb.net to communicate with the database).
I needed to assess if a field (field type varchar(1)) was null.
This statement worked for my scenario:
SELECT * FROM [table name] W...