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  Basic knowledge of AWR

  Since Oracle 10g began to support AWR, compared with Statspack, in addition to more new content for reference, HTML save format also provides a lot of convenience for viewing documents. The AWR infrastructure consists of two main parts: 1. In-memory statistics.

  2022-06-01 21:11:37 Views: 205
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  Set of problems encountered in MySQL installation

  1. When running mysqld-install, I encountered an error: Install/Remove of the Service Denied! This is mainly because the cmd command is not run with administrator privileges, so the MySQL service cannot

  2022-06-01 21:11:36 Views: 271
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  2. Rookie tutorials summarized by individuals | knowledge points of sql tutorials (SQL advanced tutorials)

  2. SQL Advanced tutorial 1. The SQLSELECT TOPSELECT TOP clause is used to specify the number of records to be returned. The SELECT TOP clause is very useful for large tables with thousands of records. Note: not all database systems

  2022-06-01 21:11:28 Views: 277
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  MySQL 8.0 window function

  MySQL 8.0 new window function, similar to oracle window function, belongs to a major feature of mysql 1.ROW_NUMBER () OVER () to generate a new sequence, sort according to c2, generate a new sequence grouped according to C1, c2 sort to generate a sequence.

  2022-06-01 21:11:23 Views: 247
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  How to migrate redis database by redis-dump and redis-load

  In the actual production scenario, redis data may need to be migrated in the production environment due to the relocation of the server room or the replacement of the physical machine. So what should be done to migrate redis databases in redis-dump and redis-load? You know what? In order to make everyone more

  2022-06-01 21:11:20 Views: 208
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  Mongo Learning Notes (4)

  The port on which mongo-java connects to mongo java to drive the https://github.com/mongodb/mongo-java-driver/downloadsmongo database is 27071. Default connection

  2022-06-01 21:11:20 Views: 234
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  Mysqlbinlog routine maintenance

  Common binlog log operation command 1) View all binlog log lists mysql > show master logs;mysql > show master logs;+-+-

  2022-06-01 21:11:15 Views: 299
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  INSERT and UPDATE in T-SQL

  1. SELECT INTO: the form of the statement is: SELECT vale1, value2 into Table 2 from Table 1 from-Target Table Table2 does not exist, the table Table2 is automatically created when inserted, and the specified word in the Table1

  2022-06-01 21:11:15 Views: 260
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  Vsftpd does virtual user authentication based on mysql

  Virtual users: where are user accounts stored? The authentication function of file, MySQL,Redis,.. vsftpd is hosted to pam:Pluggable Authencate Module, authentication framework, authentication library; the authentication function is completed through the module:

  2022-06-01 21:11:15 Views: 237
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  Mongodb create Collection Command db.createCollection details

  Mongodb create collection command db.createCollection explains the complete command as follows: db.createCollection (name, {capped:, autoIndexId:, size:

  2022-06-01 21:11:15 Views: 220
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  Oracle ASM-disk header

  We know that asm uses au as the allocation unit, and the default au is 1m, then diskheader is located on the first block of the first au, and the asm block number starts from 0. Learn about asm diskheader through the kfed tool below.

  2022-06-01 21:11:14 Views: 254
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  Springmvc+spring+mybatis+mysql configuration process

  Environment: eclipse Project Directory: jar package: web.xml Archetype Created Web Application < /

  2022-06-01 21:11:07 Views: 298
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  Introduction of LAMP Architecture of linux and installation of mysql

  Introduction to LAMP Architecture LAMP is the abbreviation of Linux+Apache (httpd) + MySQL+PHP, that is, Apache, MySQL and PHP are installed on the linux system to form a running environment to run the PHP scripting language, usually the web

  2022-06-01 21:10:57 Views: 281
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  The problem of IO persistent occupancy in the unsolved mystery of NFS

  In a core trading library, the alarm IOwait exceeds 30%, which seems to be a very common alarm, but there is actually a hidden mystery. Log in to the host and find that there are many RMAN backup scripts running. It has been running for more than 6 hours in less than an hour's task. The backup task is mounted by nfs, which is suspected to be n

  2022-06-01 21:10:45 Views: 285
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  Oracle series (1) "Picture and text + Analysis" takes you to deploy oracle database

  Blogger QQ:819594300 blog address: http://zpf666.blog.51cto.com/ friends who have any questions can contact the blogger, the blogger will help you answer, thank you for your support! We have studied Microsoft's sqlserver before.

  2022-06-01 21:10:31 Views: 215
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  Common Storage engine for MySQL Database (1)

  Friends who are familiar with mysql database will definitely like mysql's powerful plug-in storage engine, which can support too many storage engines. when the current storage engine can not meet your needs, you can choose the appropriate engine according to your needs, copy the relevant files to the relevant path, or even do not need

  2022-06-01 21:10:28 Views: 226
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  Data Warehouse of Oracle Learning (1) Import Oracle 11g Global samples schema

  Oracle 11g provides a sample schema for the data warehouse, and you can download the sample installation file at the link below. Http://www.oracle.com/technology/products/bi/olap/doc_s

  2022-06-01 21:10:27 Views: 263
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  Grid pre-installation check report PRVE-0426:/dev/shm less than the require

  Operating system information: # cat / etc/redhat-release Red Hat Enterprise Linux Server release 7.5 (Maipo) runcluvfy check result: St

  2022-06-01 21:10:27 Views: 300
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  Migrate MYSQL database to ORACLE database

  First, summary there is a need to transfer the data from the mysql database to the oracle database. I found several ways on the Internet, and finally decided to use oracel sql developer as a tool to achieve it. Mysql and oracle belong to two types.

  2022-06-01 21:10:17 Views: 233
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  Anger encryption algorithm appears in oracle data

  As a programmer, I often encounter some strange things. Today, I came across one, oracle data imported through the data pump impdp, garbled, after the following operations: 1.oracle server character set query: select useren

  2022-06-01 21:10:13 Views: 238