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In search of the algorithm, all the webmaster know that the spider's ability to identify JS code to be improved, but I just say that JS code is a site essential products that is not against the SEO common sense? The answer is not, some JS code can hurt the site, but everything has two sides, as long as the benefits outweigh the disadvantages, Everyone will think of it as a good thing. Therefore, the use of some JS code to optimize the site is also hel

external chain, further enhance the exposure of your site, Constantly let spiders come to your site to fully understand you, but at this stage some people say do not need outside the chain, as long as the contents of the update site can be. Here I can only say that this is not easy to say, each has its own argument, but are all the same purpose, are to attract spiders. So in order to improve the effect of faster, personal feel should be inside and outside the station and work together, at the s

. Operational DatabaseCreate database name;show databases;Use database name;drop database name;CREATE TABLE [if exists] table name () Table type | Table Character Set | comment;drop table [if exists] tables name;ALTER TABLE table name 1rename table Name 2;ALTER TABLE name add new field;ALTER TABLE name change original field new field data type [property];ALTER TABLE name drop field;Add a PRIMARY KEY constraintALTER TABLE name add constraint primary Key name primary key table name (primary key fi

them by the last update time. Run the following statement: SELECT * from sys.objects where type in (' U ', ' V ', ' P ') Order by modify_dateThis statement identifies all the user tables, views, and stored procedures in the database and sorts them by time, so that you can see others recently added and modified those database objects. Sys.objects does not contain triggers, and triggers are in sys.triggers. There are similar sys.tables,sys.views and so on.　　Information_schemaIf we want to quickly

large datasets. Because only the columns that are involved in the query are processed, and the column data order is stored on the storage medium, the column-based system requires much less I/O, which significantly improves query performance. Advanced Compression : Column data stores are more compressed than row-based data stores because similar data is stored sequentially on the hard disk. Amazon Redshift has a number of compression technologies that are often compressed to a large extent

follows--A enter after the character of the cursorI enter the character where the cursor iso Another line where the cursor is locateds cursor where the character is removed intoThree: the tail-line pattern is also called (last-line mode):1. Ways to enter the tail line modeIn command mode: Enter: Execute the Save and exit commandsW--Writeq--exitwq--Save and exitQ!--Force quit does not saveW! --Forced writeInput/Enter tail-line mode, where search and replace operations can be performedsuch as/Var

/etc/crontab Add the following code: Here's an example of an hourly 26-minute execution: * * * * * root/home/**/wewang/autobackupmysql_qas.sh If executed at three O ' Day, then: XX 3 * * * root/home/**/wewang/autobackupmysql_qas.sh Case 2:redhat situation. ( that is, the currently used Linux system ) Copy the script you just edited to the appropriate directory [Email protected]***** wewang]# CP autobackupmysql_qas.sh/etc/cron.daily/ As follows: parsing : Th

time bin . Generally added to the user ~/.bashrc . Docker Installation on Deepin: Https://wiki.deepin.org/index.php?title=Docker Others: https://yeasy.gitbooks.io/docker_practice/content/install/ In fact, I think I should be the whole Dockerfile, all kinds of environment sealed into, once and for all.Second, the various image source settings Pip set Tsinghua Pypi Mirror SourceAdd File ~/.pip/pip.conf , content:[global]index-url = https://pypi.tuna.tsinghua.edu

ITermYou can split the window vertically and horizontally in one window without switching toSome basic functions are as follows:1, sub-window operation: shift+command+d (horizontal) command+d (vertical)2, Find and paste: command+f, call out Find function, tab select found text, Option+enter paste3, automatic completion: command+; The Auto-complete window is paged out according to context, and the upper and lower keys Select4, Paste history: Shift+command+h5, playback function: Option+command+b6,

1. Percutaneous Absorption: essential oils have a strong osmotic force and are extremely small in molecules. They can be quickly absorbed through the skin and penetrate into the skin tissue to reach the blood and lymphatic circulation system, massage is the most commonly used method. 2. Absorption through the respiratory tract: This method is the easiest to use, use incense or drop Essential Oil on paper. W

Essential ASP. NET with examples in C # URL http://www.ebookcn.net/down.php? Id = 1140 url = 1 Asp.net basic tutorial-C # Case StudyURL http://download.chinaitlab.com/down.asp? Id = 9395 NO = 1 Fritz onion webcast Tutorial: msdn webcast: Essential ASP. net for the Web Developer (Part 1 of 15): Introduction to ASP. NET 2.0 (level 200) Thursday, August 4, 2005 P.

Essential WCF blog Series [01] Chapter 1 basic articles of essential WCF [02] Chapter 2 of essential WCF contract series [03] Chapter 3 of essential WCF channel Series [04] Chapter 4 binding to essential WCF [05] Chapter 5 of

A collection of essential qualities for successful network management that cannot be ignored. The following describes the essential qualities for successful network management. In fact, we can also see some clues about the essential quality of successful network management. After the integration, everything is very simple. With the rapid development of computer a

DongdongzzcsThe 1th page:"IT168 Zhuangao" the author of this article, Daniel Nichter, is the developer of the MySQL tool, who recommended 10 essential tools for MySQL administrators. The following is the full text content:MySQL is a complex system that requires a large number of assistive tools to repair, diagnose, and optimize. Fortunately for administrators, the high popularity of MySQL has attracted a large number of software developers to create h

Add sophisticated grid, grouping, charting, diagramming, Excel reporting, enhanced editing, and more user-interface capabilities to your. net Windows Forms, WPF and ASP. NET applications. syncfusion essential studio enterprise entity des syncfusion essential tools, essential grid, essential grouping,

--------------------------------------This article mainly includes the following content:1. essential differences between Debug and Release compilation methods2. under which circumstances will the Release version go wrong?3. How to "debug" Release programs--------------------------------------Discussion on essential differences between Debug and Release I. essential