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  Introduction and Analysis of three formats of MySQL Binlog

  1. Mysql Binlog format introduction there are three formats for MySQL binlog logs, namely Statement,MiXED and ROW! 1.Statement: every sql that modifies the data is recorded in the binlog.

  2022-06-01 06:14:54 Views: 255
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  Oracle like, unequal, implicitly converted index and no index case

  1. Overview # like (1) when using like queries, followed by fuzzy matching, then walk the index, such as like 'test%' (2) when using like queries, before fuzzy matching, do not walk the index, such as like'% test'# < > do not walk the index because not

  2022-06-01 06:14:54 Views: 225
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  The best way to stop cameras and microphones on Mac

  Everyone who exists online should be concerned about privacy. It is important to protect your digital data. However, your webcam is a bigger loophole. The bridge between the real world and the virtual world is easy to use. It is also an important tool that you may use all the time, so you need the simplest and most effective method.

  2022-06-01 06:14:54 Views: 215
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  The influence of OMF on the Migration of DATA and OCR

  Problems encountered in migrating DATA and OCR: problem 1: problems encountered when using RMAN copy to migrate data file locations (migrating from one disk group to another) COPY splicing select 'copy data with the following splicing statement

  2022-06-01 06:14:53 Views: 264
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  OmniGraffle Pro for mac (professional chart drawing software) v7.17 Chinese active version

  Are you looking for a powerful mac flowchart drawing software? omnigraffle for mac is a mind flowchart software that provides an integrated "inspector" and "template" window, a new "resource browser" that can manage templates and templates, and is full of artistic style.

  2022-06-01 06:14:50 Views: 251
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  Mysql and transaction

  What is a transaction transaction is a series of operations performed as a logical unit. A logical unit of work must have four attributes, called ACID (atomicity, consistency, isolation and persistence) attributes. Only in this way can it become a transaction 1. Transaction ACID atomicity (At)

  2022-06-01 06:14:46 Views: 294
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  The faulty machine restarts after repair, and the main library binlog is pulled wildly, which leads to network problems and certain effects.

  This paper mainly records a simple, typical failure, the cause of the problem is very simple, the problem is also very simple, students must pay attention to, a careless will have an impact on the main database. Welcome to reprint, please indicate the author and source. Author: Zhang Zheng blog: http://spac

  2022-06-01 06:14:46 Views: 210
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  Examples of mysqldump exports importing all libraries, some libraries, some tables

  1 Export all libraries mysqldump-uusername-ppassword-- all-databases > all.sql2 import all libraries mysql > source all.sql;3 export some libraries m

  2022-06-01 06:14:43 Views: 283
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  Database Weekly 30, draft data Security Law will be unveiled; 2020 Database Industry report; Yunnan Power Grid online Dameng …...

  Hot information 1. The draft data security law will be unveiled soon: the system of data classified management and emergency disposal will be established [abstract] the draft data security law will be examined for the first time at the 20th meeting of the standing Committee of the 13th National people's Congress to be held from the 28th to the 30th of this month. The draft mainly includes: establishing data classification

  2022-06-01 06:14:43 Views: 264
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  Blackmail virus in SQL Server database mdf file * .mdf.id_12322214_.WECANHELP

  * blackmail virus in the SQL Server database mdf file * .mdf.id_12322214_.WECANHELP. The extension changed to the blackmail virus * .mdf.i in the WECANHELPSQL Server database mdf file

  2022-06-01 06:14:40 Views: 203
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  Global_buffers optimization

  For global_buffers, it can be understood as the SGA of Oracle, which is used to cache data blocks retrieved from data files in memory, which can greatly improve the performance of querying and updating data, including the following parameters. 1 、 innodb_buffe

  2022-06-01 06:14:35 Views: 246
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  Differences in isolation levels between MYSQL RC and RR (no index)

  Today, a friend asked me about the LOCK of MYSQL. I sorted out an BLOG for everyone to understand and learn about his question. Interested students can refer to it to test and deepen their understanding of the principle. Conclusion: 1.RR isolation level concurrency is not as good as RC 2. In the process of development, things

  2022-06-01 06:14:35 Views: 251
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  Other (Role & User & Privilege)

  First, grant permission GRANT privilege [,...] ON object [,...] TO {PUBLIC | GROUP group | username} 2. Revoke permission REVOKE | [(

  2022-06-01 06:14:35 Views: 278
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  Explain the parameters of creating table by Oracle in detail

  Detailed explanation of the parameters of Oracle creation table create table mytable (id number (3), name varchar2 (10)) PCTFREE 20PCTUSED 70INITRANS 2MAXT

  2022-06-01 06:14:35 Views: 212
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  Oracle-OCM examination knowledge points and time requirements-11G

  As follows: time requirements are as follows:

  2022-06-01 06:14:35 Views: 286
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  Simulation of unique failure and deadlock of MySQL under RR isolation level

  Today, when I was testing the MySQL transaction isolation level, I found an interesting problem, which was also summarized by Yang Yi. The background of the http://blog.itpub.net/22664653/viewspace-1612574/ problem is

  2022-06-01 06:14:32 Views: 288
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  Oracle 12c CDB&PDBs Management

  This article summarizes the management of CDB and PDBs tasks by excerpts from the 40 ~ (st) ~ 42 chapters of Database Administrator's Guide (12.1.0.2). The excerpt of the translation focuses on operations and examples. Please refer to the official text for details.

  2022-06-01 06:14:27 Views: 269
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  Database, why is the primary key not too long?

  Answer the planet water friend's question: Mr. Shen, I heard online that the MySQL data table, in the case of a relatively large amount of data, the primary key should not be too long, is that not the case? And why is that? This problem cannot be generalized: (1) if it is an InnoDB storage engine, the primary key should not be too long; (

  2022-06-01 06:14:27 Views: 247
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  PostgreSQL DBA (24)-MVCC#4 (xmax in snapshot)

  This section explains the specific meaning of xmax in snapshot through source code. 1. Xmax mentioned in the previous section that PostgreSQL takes snapshots through the txid_current_snapshot () function in the format of xmin: xmax: X

  2022-06-01 06:14:26 Views: 243
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  Mysql basic five Vernier

  First, the definition of cursor: create procedure p12 () begindeclare row_name varchar (20); declare row_num int;declare myCursor

  2022-06-01 06:14:26 Views: 265