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  MongoDB user and Rights Management (2): user Management

  First, to create an administrator account, you need to create an account with grant permission, that is, the authorization permission for account management. Note that the account follows the library, so authorization in the specified library must also be verified in the specified library (auth). > use adminsw

  2022-06-01 16:59:05 Views: 218
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  SP2-0750: You may need to set ORACLE_HOME to your Oracle software directory

  Log in to a server today and log in with a roote user. After switching to the oracle user, execute sqlplus sys/ as sysdba to enter the database with the following error: SP2-0750: You may need to set

  2022-06-01 16:59:04 Views: 291
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  Management of Oracle

  Start and stop Oracle stop and start oracle need to switch to the oracle user, other users do not have this permission to run sqlplus but do not log in to oracle:sqlplus / nolog to connect to ora under the authority of the system administrator

  2022-06-01 16:59:04 Views: 224
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  MYSQL deployment configuration Management version 5.6

  1. MYSQL server-side program hierarchy 1.1 connection layer connection protocol: tcpip socket verifies connection validity allocation connection thread provides cache 1.3 storage engine layer plug-in storage data to magnetic for client service 1.2 SQL layer parsing optimized authorization table query

  2022-06-01 16:59:04 Views: 216
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  Introduction to mybatis 1: the principle of mybatis framework

  First, mybatis framework schematic diagram (picture reference network) second, frame schematic explanation: 1, mybatis configuration sqlMapConfig.xml, this file as the global configuration file of mybatis, configure the running environment of mybatis and other information. M

  2022-06-01 16:59:03 Views: 287
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  Predix Asset Service depth analysis

  Preface in the field of IIOT, we are faced with the challenge of saving massive data. In the Asset level, it is necessary to preserve physical objects, logical objects, complex relationships, and support the combination, classification, tagging and efficient query between objects. To sum up, it can be summarized as follows: flexible modeling style:

  2022-06-01 16:58:58 Views: 214
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  ORA-01843: invalid month

  Execute select months_between ('29murmur2008 hybrid 2008') from dual in PLSQL Developer to report error. SQL > select months

  2022-06-01 16:58:37 Views: 218
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  ActiveMQ (09): ActiveMQ message store persistence

  1. ActiveMQ not only supports persistent and non-persistent, but also supports message recovery (recovery), re-delivery, etc. 1.2PTP and PUB/SUB1.2.1 P

  2022-06-01 16:58:37 Views: 266
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  Mysql installation rpm mode

  View the rpm package rpm-qa installed in the system | grep mysql uninstalls mysqlrpm-e-- nodeps * decompress mysqltar-xvf mysql-5.7.18-1.el7.x86_64

  2022-06-01 16:58:37 Views: 299
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  A preliminary study of mysql8.0: (2) A brief introduction to MySQL Group Replication-MGR Cluster

  Introduction MySQL Group Replication (MGR for short) literally means mysql group replication, but in fact it is a highly available cluster architecture and only supports mysql5.7 and mysql8.0 versions. Is the official MySQL in 2.

  2022-06-01 16:58:37 Views: 209
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  Redis auto serialization pit ~

  Recently, the project needs to use Redis to store objects / arrays. Then, as always, follow redis- > set (KEY, OBJECT); it turns out that it can't be saved. Then I asked my colleague to try it, but I didn't expect that he could save it. It was tangled up at that time, reids.

  2022-06-01 16:58:36 Views: 215
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  NoSQL database-basic use of MongoDB

  Nowadays, websites have more and more flexible requirements for data storage, under this demand, NoSQL, that is, non-relational databases, is becoming more and more popular. The so-called non-relational database refers to the general name of the database that does not use the SQL language for data operation. This kind of database does not have a fixed schema when storing data, no

  2022-06-01 16:58:33 Views: 208
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  The installation process of pymongo

  Download the relevant version of pymongo, wget http://pypi.python.org/packages/source/p/pymongo/pymongo-2.6.3.tar.gztar-zxvf p

  2022-06-01 16:58:33 Views: 257
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  Details of SQL Server Rights Management and data recovery

  Microsoft's SQL Server is a widely used database in enterprises, and now many e-commerce websites and enterprise informatization are built and deployed based on SQL Server. With the continuous development of the network and the increasing technology of illegal users, aiming at S

  2022-06-01 16:58:03 Views: 259
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  & quot;SAN Storage & quot; and & quot;NAS Storage & quot;, which is more suitable for commercial use?

  In server storage, it is divided into two camps, namely: SAN storage and NAS storage. In the era of big data, with the rapid growth of data processing demand, traditional methods such as SAN storage or NAS storage can no longer meet the needs of business development, and centralized storage is active again. So centralized storage and distributed storage

  2022-06-01 16:57:57 Views: 250
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  Oracle function to get the age in IDCARD

  The first generation of IDCARD is 15-digit number, the second generation is 18-digit number, the new 18-digit IDCARD number means: 1-2 provincial, autonomous region, municipality code 3-4 digits, league, autonomous prefecture code 5-6 digits county, county city, district code 7-14 digits date of birth

  2022-06-01 16:57:56 Views: 292
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  Php engine optimization

  Php engine optimization 6.1.php engine cache optimization first of all, there are two main factors that affect the efficiency of php. First, libphp5.so needs to compile php source code into opcode tree (opcode); second, php needs to read and write with database, and database concurrency

  2022-06-01 16:57:56 Views: 213
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  Oracle exceeds database connection (ORA-12519)

  1. Log in using sqlplus to query the current number of connections select count (*) from vicious processors 2, and set the maximum number of connections (default is 150) select value from v$paramete

  2022-06-01 16:57:56 Views: 252
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  Summary of Oracle commonly used SQL (continuously updated)

  View tablespace related information SELECT TABLESPACE_NAME, BLOCK_SIZE,-- db_block_size size INITIAL_EXTENT FROM DBA_

  2022-06-01 16:57:55 Views: 272
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  MySQL backup script (including zabbix database)

  Requirements: backup by day, keep for one week, zabbix database does not back up historical data MySQL version: 5.7.17 script: need to establish path mkdir-pv / opt/mysql_backup/auto_backupcat / op in advance

  2022-06-01 16:57:55 Views: 268