datacamp statistics

In Query performance optimization, Logical read is very important, and its count is generally proportional to the number of result sets queried, and is proportional to the speed of data read.1,set STATISTICS IO Explicit disk IO informationSyntaxSET STATISTICS on | OFF } Output Item meaning Table Name of the table. Scan Count Number of scans performe

/** * @author Xiaoxiao 2011-1-12 * @link http://xiaoyaoxia.cnblogs.com/ * @license * Number of file lines and total files in the statistics directory • • Remove annotations */ $obj = new Caculatefiles (); If set to False, this does not display information for each file, otherwise the display $obj->setshowflag (FALSE); Will skip all files beginning with all $obj->setfileskip (Array (' all ')); $obj->run ("D:\PHPAPP\php\_tests"); All fi

Open statistics: the key to enabling fine-grained App operation and fine-grained app operationData is the lifeline and the most important intangible asset for companies, small and medium-sized entrepreneurial teams, and individual developers. Currently, App development is increasingly dependent on data support. Most developers use data as the basis for product decision-making, operation decision-making, and promotion decision-making to carry out refin

If the page statistics only need to record statistical values, do not record other specific data, it is not necessary to use the database to record, you can directly put the statistical values into a text file. Of course, this is not the best way, but this is the simplest way.Index.htmlhtml lang="ZH-CN">head> meta charset="Utf-8"> meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0, User-scalable=no " name=" Viewport "> meta

Starting from Oracle Database 10 Gb, Oracle creates a scheduled task named GATHER_STATS_JOB by default after the Database is created, which is used to automatically collect CBO statistics. This automatic task is enabled by default between-on the workday and all day on the weekend. Call DBMS_STATS.GATHER_DATABASE_STATS_JOB_PROC to collect statistics. This process first detects the missing and obsolete objec

not NULL, PRIMARY KEY (' id ') ) Engine=myisam DEFAULT charset=gb2312 auto_increment=4; "; mysql_query ("DROP TABLE IF EXISTS '". $table _prefix. " Sp_count '; '); /delete already exists $sql =str_replace ("Spilder_", $table _prefix, $sql);//Replace Prefix if (mysql_query ($sql)) { echo "Table created successfully! Writing to File "; } $f =file_get_contents ("spilder_config.php");//Get Configuration content $f =str_replace ("", "", $f);//Remove spaces $f =preg_replace ("/mysql_host=

Today, a bug was found in the data pump import operation. Database version Oracle 10203 for Solaris RAC, performing import statistics in the processing table The times wrong, the error message is: ORA-39083 and ORA-917. After careful investigation, comparing the source database analysis and the target database table analysis, found that all the partition table statistics are not imported. The basic confi

Statistics Report The system provides a multi-angle of statistical reports, including inventory statistics, sales profit statistics, employee performance statistics. 1, enter the application desktop, click the "Statistical report" icon, or from the main Menu "statistical report" to select the corresponding report, as

Before I published "Hadoop, kill chicken with sledgehammer, Python+shell to achieve the general log file query, statistics , "theneed to combine python, there may be a certain threshold, now the shell part stripping out. For example, some of the most basic methods of log statistics. (1) View files More Crawler.log View Crawler.log Logs Tail-n Crawler.log See the last 100 lines of Crawler.log (2) Matchin

sql| Statistics Writing associative queries and statistics based on several tables is really cumbersome, because many of the information based on character descriptions is difficult to extract and share, and must be rewritten when this situation is needed elsewhere. To avoid this situation, SQL artisan references the View object and describes the information of the data query through the View object; One of