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MySQL - Improve UPDATE Query Performance For Complex Calculations

匿名 (未验证) 提交于 2019-12-03 10:24:21
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I am trying to minimise the calculation / query time for the following UPDATE statement that is embedded in a stored procedure on my server... SET @EQUIPMENT_VARIABLE = 'B1010-V001'; UPDATE EQUIPMENT e /*24. MAX COF*/ SET e.MAX_COF = least(COF_SAFETY, COF_HEALTH, COF_ENVIRONMENT, COF_ASSETS) /*25. RECOMMENDED RBI INTERNAL INTERVAL*/ , e.RECOMMENDED_RBI_INTERNAL_INTERVAL = (SELECT RECOMMENDED_RBI_INTERNAL_INSPECTION_INTERVAL FROM DAMAGE_MECHANISM WHERE EQUIPMENT_ID = e.EQUIPMENT_ID ORDER BY RECOMMENDED_RBI_INTERNAL_INSPECTION_INTERVAL ASC

Get last modified time of file in linux

匿名 (未验证) 提交于 2019-12-03 10:24:21
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I am working on a C program where I need to get the last modified time of the file. What the program does is a function loops through each file within a directory and when a particular file(s) is found it calls another function to check that the last modified times of the file. Within the directory there is a mylog.txt.1 , mylog.txt.2 and mylog.txt.3 etc. When I list the directory in linux using the ll command I can see that mylog.txt.1 and mylog.txt.2 were modified on the 4th May and mylog.txt.3 was modified on the 3rd May. When the program

Spring Batch JdbcPagingItemReader seems not paginating

匿名 (未验证) 提交于 2019-12-03 10:24:21
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I'm working on an app that indexes a bunch of files in an embedded Derby(10.12.1.1) DB and then are exported as one single tabulated file. The first part is working fine since the DB is created and all records are indexed. However, when I attempt to read from the DB using JdbcPagingItemReader and write to a file I only get the number of records specified in pageSize . So if the pageSize is 10, then I get a file with 10 lines and the rest of the records seem to be ignored. So far, I haven't been able to find whats is really going on and any

jqGrid : deleting last record dosen't refresh the grid + trouble with paging

匿名 (未验证) 提交于 2019-12-03 10:24:21
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I 've two problems in jqGrid 1) Suppose there is 91 records in table with rownum set to 10, now when i navigate to last page and delete the record number 91, it does not reload the grid automatically, when i use ReloadGrid explicitly it went to reload the whole data from controller which increases the network load. 2) In my grid there are 10 pages and when I enter the page number greater than the max page in text box it gives the blank grid, ideally it should dispaly some message. any solution? ADDED CODE FOR BETTER UNDERSTANDING

34. Find First and Last Position of Element in Sorted Array

自古美人都是妖i 提交于 2019-12-03 10:10:51
Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value. Your algorithm's runtime complexity must be in the order of O (log n ). If the target is not found in the array, return [-1, -1] . Example 1: Input: nums = [5,7,7,8,8,10], target = 8 Output: [3,4] Example 2: Input: nums = [5,7,7,8,8,10], target = 6 Output: [-1,-1] Accepted 371,213 Submissions 1,076,399 class Solution { public: int bs(vector<int> &n,int t) { int l=0,r=n.size()-1,m; while(l<=r) { m=(l+r)/2; if(n[m]<t) l=m+1; else r=m-1; } return l; } vector<int> searchRange

Matching commas after the last semicolon on a row

匿名 (未验证) 提交于 2019-12-03 10:10:24
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have a CSV file that has data separated by semicolons. In the last column in the file, I have a list of numbers separated by a comma. I wan't to replace these commas with a semicolon so they become their own columns. How do I match every comma after the last semicolon on each row? I can't just replace all commas with semicolons, because some other columns in the file contain commas too. I am trying to replace them in Notepad++. 189 ; 1 ; data here , can contain commas ; 311 , 232 , 161 , 132 , 371 That should become 189 ; 1 ;

How to get first name and last name from ContactInformation?

匿名 (未验证) 提交于 2019-12-03 10:10:24
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm using the ContactPicker in a Windows Store application, and I need to retrieve the first name and last name separately for the selected contact. Unfortunately, the ContactInformation class only has a Name property, where both parts of the name are concatenated. The CustomFields property is empty. I find it hard to believe that there is no way to access the first name and last name, since they are stored separately in the Contacts application... Any idea? 回答1: The ContactInformation class has been deprecated in Windows 8.1, and

Dynamic Sticky Sorting in Mongo for a simple value or list

匿名 (未验证) 提交于 2019-12-03 09:52:54
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I'm trying to dynamically sticky sort a collection of records with the value that is sticky being different with each query. Let me give an example. Here are some example docs: {first_name: 'Joe', last_name: 'Blow', offices: ['GA', 'FL']} {first_name: 'Joe', last_name: 'Johnson', offices: ['FL']} {first_name: 'Daniel', last_name: 'Aiken', offices: ['TN', 'SC']} {first_name: 'Daniel', last_name: 'Madison', offices: ['SC', 'GA']} ... a bunch more names ... Now suppose I want to display the names in alphabetical order by last name but I want to

伪类和伪元素

ⅰ亾dé卋堺 提交于 2019-12-03 09:29:30
给链接定义样式   • 有四个伪类可以让你根据访问者与该链接的交    互方式,将链接设置成4种不同的状态。   • 正常链接 – a:link   • 访问过的链接– a:visited(只能定义字体颜色)   • 鼠标滑过的链接– a:hover   • 正在点击的链接– a:active 其他    • 获取焦点– :focus   • 指定元素前– :before   • 指定元素后– :after   • 选中的元素– ::selection 所有的伪类和伪元素    1 :checked    input:checked 选择所有选中的表单元素   2 :disabled    input:disabled 选择所有禁用的表单元素   3:empty    p:empty 选择所有没有子元素的 p元素   4:enabled   input:enabled 选择所有启用的表单元素   5:first-of-type    p:first-of-type 选择每个父元素是 p元素的第一个p子元素   6:in-range   input:in-range 选择元素指定范围内的值   7:invalid    input:invalid 选择所有无效的元素   8:last-child    p:last-child 选择所有 p元素的最后一个子元素   9:last-of

MySQL: Show last messages in INBOX one per User

匿名 (未验证) 提交于 2019-12-03 09:14:57
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: Here's my problem, in my inbox it shows multiple messages that I received from one user only. I need to to display my inbox just like facebook. Showing only one message per one user. Much like a conversation view. Wherein, the last message between me and a user is showed in the inbox (either his last message, or my last reply to him). I have tried GROUP BY, but the results are not accurate. Some recent messages are not displayed and it is not sorted by date of last conversation. Here's my database structure: +--------------------------------