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  Oracle 11g extended Statistics extended_stats

  Oracle 11g adds the feature of extended statistics in statistics collection. It can collect statistics on related columns in a table or on function expressions. So that the selection rate, cost estimation is more accurate, but also easier to follow the correct implementation plan. In relation to

  2022-06-01 06:32:36 Views: 229
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  Mysqldump: Error 2013: Lost connection to MySQL server during query when dumping

  MySQL uses Workbench to export database and reports error mysqldump: Error 2013: Lost connection to MySQL server during query when dumpi

  2022-06-01 06:32:35 Views: 208
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  MySQL official storage engine

  The storage engine is a MySql component that handles SQL operations for different table types. InnoDB is the default and most general storage engine, and it is also the official recommended storage engine, except in some specific cases. CREATE TABL in MySql 5.6

  2022-06-01 06:32:35 Views: 202
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  Zhongan OCR character recognition system

  The OCR character recognition system v5.0 is an optical character recognition (OCR) software development kit (OCR SDK). The OCR character recognition system v5.0 is a software developer, system integrator and data processor (BP)

  2022-06-01 06:32:30 Views: 267
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  Photo Mechanic for mac (digital photo management software)

  Photo Mechanic Mac version is a professional digital photo management software on the Mac OS platform, the program can help you quickly browse, rotate, preview, copy, delete, add tags and other operations. The introduction of Photo Mechanic software makes

  2022-06-01 06:32:30 Views: 283
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  How to choose a high defense server?

  For a long time, cyber attacks are the active black forces that we hate most as webmasters, and websites with good traffic may go down day by day because of frequent attacks. In particular, the DDos attack takes resources from the target network or server, resulting in a denial of service on the server, and once the enterprise network is attacked

  2022-06-01 06:32:29 Views: 236
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  How to kill all processes under a user and drop that user

  How to kill all processes under a user and drop the user Copy the sample code below into a file named kill_drop_user.sql.Open SQL*Plu

  2022-06-01 06:32:29 Views: 216
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  MyISAM Table Storage Formats

  MyISAM Table Storage Formats this article focuses on Static (Fixed-Length) TABLE and Dynamic Table and how to handle spaces. Http://dev.m

  2022-06-01 06:32:29 Views: 305
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  Compare with several string functions of Oracle,MySQL

  [PHP] 1. The concat function of concat () function 1.1 MySQL can concatenate one or more strings, such as mysql > select concat ('10'); +-+ | conca

  2022-06-01 06:32:29 Views: 238
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  Automatic age calculation script in demography

  1. Automatic age calculation script in demography (1) function getAge () {var subjid=va_getValue ('subjid'); var where1 = "obj.subjid ='" +

  2022-06-01 06:32:29 Views: 224
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  Xtrabackup backup recovery test

  Test preparation 1. Install the xtrabackup tool the following test installs the binary package of the xtrabackup backup and recovery tool for testing. The installation path is mysql installation path, and the installation path of this test mysql is: / home/q/percona

  2022-06-01 06:32:28 Views: 287
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  Some basic commands of linux and mysql index

  Some basic commands of Linux: most of the operations in Linux are implemented through terminals, or directly use the command line interface. If you generally use the Linux architecture server, the command line interface is installed. The reason for not installing the graphical interface is that it is not necessary, and for

  2022-06-01 06:32:08 Views: 223
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  Oracle solves the problem of table lock

  Problem: update a table of data, only a few hundred, and then very slow, has been executed, and then forced to return, re-execution is still the same, considering that it may be the problem of locking the table! Solution: ① first finds out which session is locked: select object_name,mac

  2022-06-01 06:32:04 Views: 297
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  How much do you know about domestic databases (list of domestic databases in January 2020)

  This article is about 14000 words and contains the following five parts: 1. Opening 2. Domestic database product list, including product name, product category and manufacturer name; 3. Summary of domestic database products, basic product introduction, application scenarios, etc. The application case of domestic database in the financial field; 5.

  2022-06-01 06:32:04 Views: 242
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  Summary of several situations of Master-Slave non-synchronization in MySQL

  1. Network delay because mysql master-slave replication is an asynchronous replication based on binlog, binlog files are transmitted through the network, of course, network delay is the vast majority of reasons for master-slave non-synchronization, especially the probability of data synchronization across computer rooms is very high, so read and write

  2022-06-01 06:32:00 Views: 265
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  A Mysql OCP exam that I experienced personally.

  After taking the Mysql OCP exam in late May 2020, I received an email 10 minutes later that I had passed the exam. A day later, I saw my Mysql OCP certificate on the Oracle official website because my work involved a lot of Mysql database maintenance.

  2022-06-01 06:32:00 Views: 277
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  Overview of different MySQL replication solutions

  I have worked on the solution team for many years and have found that database replication is always misunderstood and even completely misunderstood by some people, so this article will review the concept of replication in the MySQL environment and clarify some misunderstandings about replication. What is replication? Copy: make sure that the information is copied and has a destination

  2022-06-01 06:31:49 Views: 301
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  Install Oracle 11g on Red Hat Enterprise 6.5

  Before installation check hardware requires a minimum of 1G of check hardware requirements memory. It is recommended to use 2G or higher free to view Memory at least 1G, recomm.

  2022-06-01 06:31:40 Views: 267
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  MySQL Sharding

  Sharding classification:-Vertical split? Horizontal split? Split vertically? Horizontal and vertical split? Business split-horizontal split? Separation of historical data and real-time data? Split multiple tables in a single database? Split cdNvQ4F+71vLCC7nJyYrf/ with multi-database and multi-table

  2022-06-01 06:31:38 Views: 255
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  2011-10-19 understanding of REF CURSOR

  Http://www.itpub.net/thread-1499223-7-1.html64 Building I created this form and filled in the data: CREATE TABLE plch_employees (employee)

  2022-06-01 06:31:38 Views: 296