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  MySQL uses the correct pose of AES_ENCRYPT () / AES_DECRYPT () encryption and decryption

  There is a need to use the AES_ENCRYPT () function to encrypt plaintext and store it in MySQL, but there are some problems. It is said that the encrypted ciphertext will be decrypted and taken out as NULL. I took a look at the watch structure she sent me: then I looked at her through AE.

  2022-06-01 07:22:16 Views: 267
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  Principle of mysql innodb lock mechanism

  1. Lock and latchlatch are generally called latches, which are used to ensure the correctness of the critical resources of concurrent threads, and there is no deadlock detection mechanism. Divided into: mutex (mutex), rwlock (read-write lock) lock object is the number of transactions, used to lock

  2022-06-01 07:22:02 Views: 249
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  GDB debug MySQL

  GDB mainly helps you to complete the following four aspects of functions: 1, start your program, you can run the program at will according to your custom requirements. 2. Allow the debugged program to stop at the breakpoint of the setting you specify. (breakpoints can be conditional expressions) 3. When the program is stopped

  2022-06-01 07:22:01 Views: 205
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  License and genuine use of oracle

  1. The difference between authentic Oracle products and piracy goes straight to the theme, which is what many R & D do not pay attention to. For business (that is, you are not at home and play by yourself), strictly speaking, it is the difference between a piece of license paper. No matter when, the downloaded version can set up the database and develop normally.

  2022-06-01 07:21:58 Views: 269
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  Mysql Learning 5: chapter 2: mysql installation Startup and shutdown-password reset and Rights Management

  1.1. For the problem of root password loss in mysql database, skip the permission table by adding-- skip-grant-tables parameter # mysql-uroot-p forcibly stop the database. Check the mysql process number [root@localhost] first.

  2022-06-01 07:21:55 Views: 269
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  How do home decoration enterprises seize the stock housing market?

  In the past two years, the life of large and small decoration enterprises in China has not been so easy, which is clearly shown that the number of closure of decoration enterprises has increased exponentially, while profound changes have taken place in the home decoration market. a large number of traditional decoration enterprises lack a clear understanding of the market situation, slow response, unable to keep up with the market changes.

  2022-06-01 07:21:55 Views: 292
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  How to choose the appropriate mysql version according to the percona xtrabackup version of the production environment

  Preface in the daily database operation and maintenance work, we often use percona xtrabackup for database backup. Due to the evolution and time changes of business systems, there may be different mysql versions, including mysql 5.6and mysql 5.7,

  2022-06-01 07:21:49 Views: 262
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  Monitoring system and zabbix Foundation (1)

  Monitoring system and zabbix Foundation (1) Overview: in this chapter we will introduce

  2022-06-01 07:21:35 Views: 205
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  How to insert the queried data into the new table by Sqlserver

  First create a new table: then use SQL to implement the insert of the queried data into the new table: Insert into test.dbo.tmp_tj001 (server_principal_name,object_name,max

  2022-06-01 07:21:32 Views: 223
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  Oracle adds pdb environment, and realizes online cloning across servers through database link.

  Premise: install the database software and create the database of CDB mode. This article introduces the content: first, how to create pdb, and create tablespaces, user two, and clone the pdb online across servers through database link. one。 How to create a pdb, and

  2022-06-01 07:21:11 Views: 284
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  One of the thoughts on the transaction lock lock mode of oracle database transaction

  Preface Database transaction is a very basic and important concept in oracle. Some related concepts have been introduced before. The related articles are as follows: oracle generates transaction transaction several ways or methods oracle transaction isolation level transacti

  2022-06-01 07:21:11 Views: 209
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  Mysql implements Master-Slave replication

  Mysql's Replication is an asynchronous replication process (the above version of mysql5.1.7 is divided into asynchronous replication and semi-synchronous modes), replicating from one Mysql instace (we call it Master) to another My

  2022-06-01 07:21:08 Views: 262
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  Tips for quickly getting the execution plan of SQL with A-Time time

  Tips for quickly getting the execution plan of SQL with A-Time time there are two ways to get the execution plan with time by outputting the results to a file using spool, and then going directly to the file to view the execution plan: 1. Set the parameter statistics_level=an in the session

  2022-06-01 07:21:07 Views: 271
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  Operation and maintenance audit system

  Product introduction intranet operation and maintenance integrated audit management system [abbreviated as: fortress machine]. Is a collection of user management (Account), authorization management (Authorization), authentication management (Authentication) and comprehensive audit (Audit)

  2022-06-01 07:21:01 Views: 227
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  [Mongodb] add a new shard to the sharding replication set environment

  1. Create a new shard3 profile [root@ip-10-1-2-68 etc] # more shard3.conflogpath=/usr/local/mongodb/logs/mong on each node

  2022-06-01 07:20:52 Views: 273
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  Redis,memcached

  Redis can do distributed memcached can not mangodb is a distributed database, can store json string, is a nosql type redis is a cache server, but used as a database server, because it is placed in memory, so memory consumption is relatively large, generally

  2022-06-01 07:20:52 Views: 291
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  Take an inventory of three notebooks. Get in the car and show you the recommended lightweight books.

  There are many excellent notebooks in the notebook market this year, among which several notebooks with "all-round" strength are particularly prominent. These notebooks are not only thin and excellent in office properties, but also equipped with strong performance for users to use. At the same time, take into account the needs of all kinds of notebooks. This time, I will recommend these notebooks to you.

  2022-06-01 07:20:52 Views: 288
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  Transaction isolation level

  Transaction isolation is one of the foundations of database processing. Isolation is the abbreviation of I in ACID. When multiple transactions make changes and execute queries at the same time, the isolation level is set to fine-tune the balance between performance and reliability, consistency and result reproducibility. MySQL supports the following isolation levels

  2022-06-01 07:20:51 Views: 289
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  MySQL 5.6Master-slave Slave_IO_Running:Connecting/error connecting to master *-retry

  For the MySQL master and slave you just configured, click (here) to collapse or open mysql > SHOW slave STATUS\\ gateway * 1. Row *

  2022-06-01 07:20:51 Views: 206
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  Oracle Java Stored Procedure + package call

  1. Create Java Stored Procedurecreate or replace and compile java source named "TestHello" aspublic class

  2022-06-01 07:20:50 Views: 220