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  7: pros and cons based on statement and row replication

  Each binary log format has its advantages and disadvantages. For most users, the hybrid replication format provides the best combination of data integrity and performance. However, if you want to take advantage of the functional advantages of statement-based or row-based replication formats when performing certain tasks, you can use the information in this section

  2022-06-01 16:48:03 Views: 273
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  Application of Oracle string interception and splicing

  Today, someone asked a question about the interception and splicing of Oracle strings. Let me help him write SQL. After reading the description of the problem, I tried to solve it. Using lunch break to realize the function, the problem does not seem difficult, but the train of thought must be clear, otherwise it will be messy. The key is the extensive use of Or.

  2022-06-01 16:48:03 Views: 249
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  Enumeration in JAVA (1)

  In practical programming, there are often such "datasets" whose values are stable in the program, and the elements in the "dataset" are limited. For example, seven data elements from Monday to Sunday make up the "data set" of the week, and four data elements of spring, summer, autumn and winter form the "data set" of the four seasons.

  2022-06-01 16:47:56 Views: 219
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  The script finds tables in mysql that are missing primary keys

  Sometimes early built tables may lack primary keys, which can easily lead to queries or slow master-slave replication. Here is a small script to find a table without a primary key. #! / bin/bash# find the table without primary key # Date: 2017/06/05source

  2022-06-01 16:47:47 Views: 227
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  Ssdb operation document

  # starts as a background process (does not block the command line). / ssdb-server-d ssdb.conf# restart. / ssdb-server-d. / ssdb.conf-s restart# shuts down the database. / ssdb-s

  2022-06-01 16:47:47 Views: 235
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  MYSQL basic syntax commands

  Start, stop, and uninstall of MySQL services run at the Windows command prompt: start: net start MySQL stop: net stop MySQL uninstall: does sc delete MySQL distinguish between identifiers

  2022-06-01 16:47:47 Views: 288
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  Practice of redis3.2.3 installation and deployment

  There are many versions of redis, the current latest version of redis-3.2.3, the installation steps are the same as those of the previous version, needless to say, the following installation steps: 1. First, you need to download the tar installation file download address: http://redis.io/ download version

  2022-06-01 16:47:47 Views: 264
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  The important block from oracle asm dd

  The previous article wrote the dd output file in asm, this article only dd blocks, mainly for the case of large files. Take the scott schema as an example: table information SQL > select * from emp where mgr=7566 and empno before modification

  2022-06-01 16:47:46 Views: 218
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  MySQL Group Replication mgr single master proxysql read-write separation configuration process

  1. Prepare for mgr installation in the previous article 2. Create a user and import the script GRANT ALL ON *. * TO 'rootuser'@'%' IDENTIFIED BY' 123456; / mgr/mysq

  2022-06-01 16:47:46 Views: 207
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  PostgreSQL can be installed in many ways

  The PostgreSQL test environment is a CentOS7.x x86slave 64-bit system. Premise: install minimized installation install Epel source get the source code to the official website to get the source code: wget https://ftp.postgresql.o

  2022-06-01 16:47:46 Views: 265
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  Percona-toolkit usage Summary

  Pt-online-schema-changept-online-schema-change-nocheck-replication-filters-recursion-method=none

  2022-06-01 16:47:46 Views: 210
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  How to create and open a database by mysql

  How does mysql create and open a database? In view of this problem, this article gives the corresponding analysis and answers, hoping to help more friends who want to solve this problem to find a more simple and feasible way. The command for mysql to create and open the database: 1. Create a database / / create a database

  2022-06-01 16:47:45 Views: 218
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  Using rlwrap to realize sqlplus arrow keys to flip through the oracle history commands that have been typed.

  Students who are beginners of Oracle may use SecureCRT to connect to the server under Linux, and when using sqlplus, they may re-execute it like the command entered before, which cannot be realized. I'm sure our predecessors must have encountered the same problem, so Google

  2022-06-01 16:47:45 Views: 294
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  The method of jumping out of Loop in Oracle stored procedure

  Record the use of exit and return exit is used to jump out of the loop loopIF V_KBP IS NULL THENEXIT;END IF;end loop;return out of the stored procedure loopIF V_KBP IS

  2022-06-01 16:47:45 Views: 255
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  V$LATCH_CHILDREN view

  Http://docs.oracle.com/database/121/REFRN/refrn30109.htmV$LATCH_CHILDRENV$LATCH_CHILDREN displays st

  2022-06-01 16:47:45 Views: 219
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  The usage of MYSQL encryption function

  Common encryption functions include md5,hash,password and so on. Web for mysql applications is generally md5,32 bit. Here's how to use the MYSQL encryption function. 1 select md5 MD5 encryption ('a

  2022-06-01 16:47:44 Views: 222
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  The difference between union and union all in mysql Database

  This article uses easy-to-understand examples to introduce the difference between union and union all in mysql database. The content of the article is compact step by step. I hope you can get something according to this article. When do I use union and union all? If it were before us

  2022-06-01 16:47:32 Views: 285
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  How to query which tables in mysql database have the largest amount of data

  Under the information_schema of 1.mysql, there is a data dictionary table that stores the basic information of the database. You can query the tables table to get the table-related information you need. Mysql > show databases;2. Use

  2022-06-01 16:47:20 Views: 223
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  Mybatis+MySQL UUID primary key generation strategy

  SELECT REPLACE (UUID (),'-',') FROM DUALinsert into spm_invoice (invoiceId, invoiceNum, invoiceItem,i

  2022-06-01 16:47:20 Views: 209
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  The method of deleting custom database users by SQLServer

  This article will explain in detail the method of deleting custom database users by SQLServer. The editor thinks it is very practical, so I share it for you as a reference. I hope you can get something after reading this article. Delete user-defined database user considerations cannot be removed from the database

  2022-06-01 16:47:08 Views: 214