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  Linux command: part 7 of MySQL series-- exercises related to INSERT, DELET and UPDATE sentences

  1. INSERT insert statement 1. Bulk insert field data INSERT INTO tb_name (col1,col2,...) VALUES (val1,val2,...), (val1,val2,...); Usa

  2022-06-01 11:22:42 Views: 233
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  Install Redis on a Windows system

  Install Redis on Windows system now Internet companies are using distributed cache, or distributed database, in which we are also using Redis for database reading and writing and distributed caching. Redis is not only simple and flexible, rich in data structure, but also in the number.

  2022-06-01 11:22:42 Views: 210
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  RECORDS of compound data types in 10.PL_SQL--PL_SQL

  1. Record and Collection Overview the data types of the variables introduced so far belong to scalar, that is, scalars, such as × × ×, string, date, and so on. Any programming language needs to provide some means for users to create more complex variables, and PL/SQL is no exception.

  2022-06-01 11:22:12 Views: 301
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  Mysql sets the isolation level

  Four isolation levels READ-UNCOMMITTED read uncommitted READ-COMMITTED read committed REPEATABLE-READ repeatable readable SERIALIZABLE serial new connection to make transaction

  2022-06-01 11:22:11 Views: 218
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  The detailed explanation of the MongoDB database, and the MongoDB4.0 version of

  About MongoDB MongDB is a cross-platform, document-oriented database that can achieve high performance, high availability, and can be easily extended. It is an open source database system based on distributed file storage. In the case of high load, adding more nodes can guarantee the server

  2022-06-01 11:22:11 Views: 217
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  5.Python operation MySQL, three-tier architecture, Socket network programming

  Python operation MySQL- MySQL query operation-MySQL insert data-MySQL bulk insert data-MySQL delete data-MySQL update database-MySQL transaction-MySQL batch access dictionary

  2022-06-01 11:22:11 Views: 219
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  Navicat usage tutorial: an overview of the health and performance of all instances

  Download the latest version of Navicat Monitor Navicat Monitor is a secure, simple and agentless remote server monitoring tool. It has a powerful function to maximize the effectiveness of your monitoring. Monitored servers include MySQL and Mar

  2022-06-01 11:21:47 Views: 255
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  Oracle modifies the default character encoding

  View the Oracle database character set: SQL > select userenv ('language') from dual;USERENV (' LANGUAGE')-

  2022-06-01 11:21:46 Views: 208
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  Establish the login authentication function of mongodb

  For a perfect database system, authority control is necessary, and mongodb is no exception. An unauthenticated database has proved to be a breakthrough for *, so whatever the reason, database authentication is very important for a production system. In

  2022-06-01 11:21:32 Views: 239
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  Oracle 11g goldengate and oracle 11g data synchronization

  1. Download and install goldengate software (both sections need to be installed) glodengate download address: http://pan.baidu.com/s/1pLtVTJt password: exob [oracle @ oracleogg

  2022-06-01 11:21:32 Views: 258
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  Introduction and application examples of page static technology Freemarker technology.

  1. Introduction to FreeMarker 1. The difference between dynamic web pages and static web pages before entering the topic, I would like to introduce what is a dynamic web page. Dynamic web page refers to a web page programming technology corresponding to static web pages. Static web page, with the generation of HTML code, the content and display of the page

  2022-06-01 11:21:32 Views: 238
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  Creation and deletion of mysql index

  The index can be created in a CREATE TABLE statement, or you can add an index to the table using CREATE INDEX or ALTER TABLE alone. Deleting an index can be done using ALTER TABLE or DROP INDEX statements.

  2022-06-01 11:21:32 Views: 232
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  Oracle stored procedures and functions

  Create a stored procedure: CREATE OR REPLACE procedure proc_trade (v_tradeid in tt_b.number%TYPE

  2022-06-01 11:21:31 Views: 280
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  The basic statement of sql-the query statement select of sql

  Introduction of SQL query statement-- select statement 1. Simple select query statement 1.1Lookup SQL > select * from emp;1.2 lookup SQL > select empno,ename from em

  2022-06-01 11:21:31 Views: 275
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  Oracle determines whether the two time periods overlap.

  Select 'yes' from dual where d > an and c < b; method 2: select' yes' from d.

  2022-06-01 11:21:31 Views: 239
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  [MongoDB Learning Note 3] handles MongoDB connection errors

  The following error occurs when you enable shell to login to mongo for the first time after installing MongoDB: warning: Failed to connect to 127.0.0.1 mongo 27017, reason: errno:111

  2022-06-01 11:21:31 Views: 298
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  Monitoring using JConsole

  1. The JConsole graphical user interface is a monitoring tool that conforms to the Java Management extension (JMX) specification and can monitor information about the performance and resource consumption of applications running on the Java platform. Start JConsolejconsole [opti]

  2022-06-01 11:21:02 Views: 233
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  Upgrade from vSphere 5.5 to 6-2-upgrade vCenter Server 5.5 to 6.0

  9.3 upgrade vCenter Server 5.5 to 6.0 before upgrading vCenter Server 5.5, check that your vCenter Server 5.5 virtual machine should have at least 8GB memory and 2 processors, as shown in figure 1-1

  2022-06-01 11:20:34 Views: 263
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  Implementation of mongodb replication set

  Replication set (Replica Sets) is a replication function based on master / slave replication mechanism, which synchronizes the same data asynchronously, so that multiple machines have multiple copies of the same data. Due to the characteristics of automatic failover and recovery, there is no need for user intervention when the master database is down.

  2022-06-01 11:20:33 Views: 234
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  Mydumper usage reference

  Mydumper export and import have many advantages, especially in the aspect of parallelism, there are many articles online and do not explain too much, but with the release and enhancement of mysqlpump, the parallel advantage of mydumper will no longer exist. Here is the daily use of mydumper.

  2022-06-01 11:20:33 Views: 232