How to export mysql's 1 billion data to U disk before work?

previously on In the first sentence, export all the data from January this year to facilitate auditors'checking. Then all the data are integrated, and every 100w items are exported into a separate file. The line contents are organized according to the text format of csv. In a few simple sentences, there are many pits in it. Difficulties in real ...

Posted on Sun, 14 Apr 2019 15:21:32 -0400 by mator

Configuration and use of c3p0 connection pool in Spring

Configuration and use of C3P0 in Spring Software development is inseparable from database operation. Data is like the blood of software, especially in the current information age. Spring, as J2EE's one-stop lightweight java development framework, of course provides a JdbcTemplate encapsulation for database operations. The internal implementati ...

Posted on Sun, 14 Apr 2019 03:03:32 -0400 by Kryllster

Sharing-jdbc monthly breakdown

<!--sharding-jdbc --> <dependency> <groupId>io.shardingsphere</groupId> <artifactId>sharding-jdbc-spring-boot-starter</artifactId> <version>3.1.0</version> </dependency> <!--sharding-jdbc End--> Sharin ...

Posted on Sat, 13 Apr 2019 23:21:32 -0400 by stringman

oracle paging and creating tables and constraints

oracle paging Review mysql paging with limit keyword Query the first two records in the users tableselect * from users limit 0,2 //or select * from users limit 2;0 represents the index number of the first record, starting at 0 2 indicates that up to two records are selected Query out user records in Articles 2 to 4select * from users li ...

Posted on Fri, 12 Apr 2019 19:54:31 -0400 by AliceG

MySQL series - 4. Accessing databases using Python 3

1. Install MySQL Driver pip install mysql-connector After installation, enter command line mode and import driver. If no error is reported, the installation is successful. Python 3.6.7 (default, Oct 22 2018, 11:32:17) [GCC 8.2.0] on linux Type "help", "copyright", "credits" or "license" for more information. >>> import mysql.connector ...

Posted on Fri, 12 Apr 2019 13:48:32 -0400 by nikosft

Installing MySQL Database on Nanopi2 and Simple Usage

In embedded Linux platform, if you need to use database functions, you will generally choose SQLite or MySQL. MySql is mainly used for the development of server side, which is full-featured, comprehensive and pursues maximum concurrent efficiency; while Sqlite is used for the development of client side, with simple function, miniaturization an ...

Posted on Fri, 12 Apr 2019 12:36:31 -0400 by zc1

MySQL Master-Slave Replication Practice-GTID-Based Replication

MySQL Master-Slave Replication Practice-GTID-Based Replication GTID-based replication brief introduction GTID-based replication is a new way of replication after MySQL 5.6. GTID (global transaction identifier) is the global transaction ID, which guarantees that each transaction submitted on the main repository has a unique ID in the cl ...

Posted on Fri, 12 Apr 2019 01:54:31 -0400 by cdc5205

Two powerful tools for locating MySQL locks and transaction problems

Preface Both MySQL servers and independent storage engines can set locks. Generally speaking, locks are divided into read locks (or shared locks) and write locks (exclusive locks). Read locks allow concurrent threads to read locked data, but prohibit writing data; on the contrary, write locks prohibit other threads from reading and writing op ...

Posted on Thu, 11 Apr 2019 15:03:31 -0400 by Mobile

Integration of Spring Boot and MyBatis

Create a maven project that imports the required dependencies in the pom file: spring-boot-starter-web mybatis-spring-boot-starter mysql-connector-java spring-boot-starter-test com.github.pagehelper or pagehelper-spring-boot-starter [dependency of paging plug-ins] spring-boot-devtools Create the basic structure of the proj ...

Posted on Thu, 11 Apr 2019 12:48:31 -0400 by sgbalsekar

mysql database basic statement training questions

SET FOREIGN_KEY_CHECKS=0; -- ---------------------------- -- Table structure for course -- ---------------------------- DROP TABLE IF EXISTS `course`; CREATE TABLE `course` ( `cno` varchar(10) DEFAULT NULL, `Cname` varchar(255) DEFAULT NULL, `tno` varchar(10) DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8; -- ----------------------- ...

Posted on Thu, 11 Apr 2019 02:24:31 -0400 by mzshah