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搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
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#进入mongodb文件夹
cd /data/mongodbtest
3、下载mongodb的安装程序包
wget http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.4.8.tgz
注意linux生产环境不能安装32位的mongodb，因为32位受限于操作系统最大2G的文件限制。
#解压下...
How can I group by date time column without taking time into consideration
... BY DATEADD(day, DATEDIFF(day, 0, MyDateTimeColumn), 0)
Or in SQL Server 2008 onwards you could simply cast to Date as @Oded suggested:
GROUP BY CAST(orderDate AS DATE)
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How to export data as CSV format from SQL Server using sqlcmd?
...l Invoke-Sqlcmd |Export-Csv pipeline
To adapt the example for SQL Server 2008 and 2008 R2, remove the #Requires line entirely and use the sqlps.exe utility instead of the standard PowerShell host.
Invoke-Sqlcmd is the PowerShell equivalent of sqlcmd.exe. Instead of text it outputs System.Data.Dat...
Calculate relative time in C#
...o and an ISO 8601 timestamp in the title:
<abbr class="timeago" title="2008-07-17T09:24:17Z">July 17, 2008</abbr>
into something like this:
<abbr class="timeago" title="July 17, 2008">4 months ago</abbr>
which yields: 4 months ago. As time passes, the timestamps will au...
Identity increment is jumping in SQL Server database
...e flag 272 which makes the IDENTITY allocation logged as in versions up to 2008 R2. This applies globally to all databases.
Or, for recent versions, execute ALTER DATABASE SCOPED CONFIGURATION SET IDENTITY_CACHE = OFF to disable the identity caching for a specific database.
You should be aware no...
Lock Escalation - What's happening here?
While altering a table (removing a column) in SQL Server 2008, I clicked the Generate Change Script button and I noticed that the change script it generated drops the column, says "go" and then runs an additional ALTER TABLE statement that appears to set the lock escalation for the table to "TABLE"....
Stop Excel from automatically converting certain text values to dates
...uotes will accomplish what you want. It forces the data to be text.
eg. ="2008-10-03",="more text"
EDIT (according to other posts): because of the Excel 2007 bug noted by Jeffiekins one should use the solution proposed by Andrew: "=""2008-10-03"""
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使用App Inventor扩展实现多点触控：Rotation Detector · App Inventor 2 中文网
...我们 发布日志 服务条款 教育 中文教程 中文社区 反馈 我要反馈 var _hmt = _hmt || []; (function() { var hm = document.createElement("script"); hm.src = "https://hm.baidu.com/hm.js?8d28...
SQL Server - transactions roll back on error?
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It appears in the docs for 2000, 2005, and 2008 so I assume yes. We are using it in 2008.
– user121301
Nov 17 '09 at 15:54
8
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Specify custom Date format for colClasses argument in read.table/read.csv
..., function(from) as.Date(from, format="%d/%m/%Y") )
tmp <- c("1, 15/08/2008", "2, 23/05/2010")
con <- textConnection(tmp)
tmp2 <- read.csv(con, colClasses=c('numeric','myDate'), header=FALSE)
str(tmp2)
Then modify if needed to work for your data.
Edit ---
You might want to run setClas...