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  Several methods of grouping and summarizing the range of values in SQL

  Several methods of grouping and summarizing the value range of SQL in the statistical work, we often encounter the situation of grouping and summarizing the value range of a quantity. For example, if we assume that the value of id is 120000, we should group according to the group distance of 5000. We need to figure out that the value below 5000 includes 5000.

  2022-06-01 18:08:25 Views: 231
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  Oracle installation environment one-click deployment script

  OS:centos5.9 32-bit database: oracle 10g 32-bit after all dependent packages have been installed, this script can be directly installed with OracleBinhecho # install r

  2022-06-01 18:08:25 Views: 282
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  Installation of oracle12c in ubuntu14.04 and its error solution

  1. Change the apt source cp / etc/apt/sources.list / etc/apt/sources.list.bakvim / etc/apt/sources.listcat / etc/apt/sou

  2022-06-01 18:08:00 Views: 214
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  Windows remote connection to Oracle 12c database (included software package)

  In the process of Oracle maintenance, if we happen not to be in the computer room or the location does not have Oracle database management tools, we use the computer around us to make a remote connection to check the relevant information. Next, the editor will share with you the use of the department without database management tools.

  2022-06-01 18:07:30 Views: 258
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  Recognize the oracle listener profile

  There can only be one listener for the same database on the same host. When we configure multiple listeners, it will listen to the database on another host, but the performance is not good. Listener.ora configuration file explanation: listener section: LISTENER = (DESCRI

  2022-06-01 18:07:29 Views: 283
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  The meaning of hbase-site.xml parameters in Hbase

  Hbase.client.scanner.caching defines the number of rows to retrieve when the next method is called in the scanner. The higher the number, the fewer remote calls the client needs to make to the RegionServer during the scan. The higher the value, the more the client consumes

  2022-06-01 18:07:29 Views: 230
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  Vue refreshes the current page, 11 choose 5 platform maintenance

  In the vue management background, there are often additions, deletions, changes and queries in the form of 11-option 5 platform maintenance (enterprise E: 1793 408). After the modification, you have to refresh the page or adjust the method, but in the permissions menu role page, if you change the permissions of the account you are currently logged in, you need to browse globally.

  2022-06-01 18:07:29 Views: 202
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  MongoDB 3 sharding cluster installation configuration

  Operating system: CentOS 6 x86_64MongoDB version: 3.4.3 Cluster Host Topology: host mongo shardsvr & ReplSetNamemongo configsvr & ReplSetNam

  2022-06-01 18:07:26 Views: 231
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  ORACLE 100 cases trial 5

  Oracle Series "five": SQL Comprehensive exercise [1] list the jobs with a minimum salary greater than 1500 and the total number of employees engaged in this job select job,count (*) from emp group by job having

  2022-06-01 18:07:25 Views: 275
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  The basic components of the database system

  The composition of the database system is shown in the following figure. 1) the hardware of the hardware database system includes the host computer, keyboard, monitor and peripherals (such as printer, optical disk drive, tape drive, etc.). Due to the large amount of data stored and processed by the general database system, coupled with the rich functional software of DBMS, it makes

  2022-06-01 18:07:25 Views: 271
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  Replication-manager for MySQL ha installation test notes

  1. Configure yum source [root@mgr1 ~] # cat / etc/yum.repos.d/ sources 18. Repos [18] name=Signal18 repositoriesbaseurl

  2022-06-01 18:07:19 Views: 271
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  Use the shared memory segment of Oracle in Oracle 11g-IPCS

  A long time ago, in a lecture, using the command ipcs, I found that the shared inner segment of oracle was very small, as follows: oracle@mydb ~] $ipcs-a-Shared Memory Segments-

  2022-06-01 18:07:18 Views: 218
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  The Replica Set of practical MongoDB-Replication

  Practical MongoDBMaster-SlaveMongoDB supports asynchronous data replication between different services to achieve failover (failover, failover, failure recovery) and redundancy (data redundancy). At one time, only

  2022-06-01 18:07:18 Views: 219
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  Analysis of 1Z0-052 in Chinese and English (2)

  Examine the following statement that is used to modify the primary key constraint on the SALES table

  2022-06-01 18:07:12 Views: 217
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  Mysql-mmm cluster deployment

  90 Master <-> 91 Master |-| | 92 from 93 slave systemctl stop firewalld.servic

  2022-06-01 18:07:12 Views: 219
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  Python connection mysql

  Python3.x connects to the database (pymysql) = pymysql= because the MySQLdb module does not yet support Python3.x

  2022-06-01 18:07:12 Views: 291
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  Summary of redis knowledge

  Data structures in redis7: strings, hash, collections, lists, ordered collections, geolocation GEO,hyperloglog strings the simplest key-value storage internal data structure similar to memcache is SDS

  2022-06-01 18:07:11 Views: 211
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  Backup and recovery of 03-Influxdb

  01-InfluxDB introduction Please add a link to describe the rights management of 02-influxdb backup and recovery of 03-Influxdb InfluxDB comes with influxd command also supports data backup and recovery, backup is divided into meta, ma

  2022-06-01 18:07:11 Views: 274
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  12c flash back to common view

  SYS@orcl1 > set lines 200SYS@orcl1 > col name for a50SYS@orcl1 > select * from vs. recovery

  2022-06-01 18:07:11 Views: 232
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  Percona related tools

  Percona related tools https://launchpad.net/+search?field.text=percona

  2022-06-01 18:07:10 Views: 255