MySQL export data select into outfile usage

Reproduced from: https://blog.csdn.net/caoxiaohong1005/article/details/72571798 1. select into outfield function: Export data to the specified directory of pc. 2. Syntax: SELECT ... INTO OUTFILE 'file_name' [CHARACTER SET charset_name] [export_options] export_options: [{FIELDS | COLUMNS} [T ...

Posted by artist-ink on Thu, 30 Jan 2020 21:26:38 -0800

MySQL export data select into outfile usage

Reproduced from: https://blog.csdn.net/caoxiaohong1005/article/details/72571798 1. select into outfield function: Export data to the specified directory of pc. 2. Syntax: SELECT ... INTO OUTFILE 'file_name' [CHARACTER SET charset_name] [export_options] export_options: [{FIELDS | COLUMNS} [T ...

Posted by west4me on Thu, 30 Jan 2020 21:21:15 -0800

Implement dataTable plug-in in SSM to realize paging

01 download resource file The following three JS and CSS resource files are introduced into the project in the BootStrap front-end framework <!-- DataTables --> <script src="/static/assets/bower_components/datatables.net/js/jquery.dataTables.min.js"></script> <script src="/stat ...

Posted by DaZZleD on Thu, 30 Jan 2020 06:43:38 -0800

JDBC notes - JDBC concept, introduction, and related objects

## JDBC: 1. Concept: Java DataBase Connectivity, Java language operation database * essence of JDBC: in fact, it is a set of rules defined by the official (sun company) to operate all relational databases, that is, interfaces. Each database manufacturer will implement the socket and provide the da ...

Posted by ballouta on Thu, 30 Jan 2020 00:04:29 -0800

python entry practice - student management system

Opening chapter Recently, I have nothing to do at home and started Python language. I have been engaged in Java development, so it is easier to learn Python than to start from scratch. After learning the basic grammar, I made a student management system (necessary for university course design ~), and consolidated the python grammar. Next, I wil ...

Posted by Monadoxin on Wed, 29 Jan 2020 23:53:18 -0800

Analysis of MySQL index

General index Key at creation: INDEX KEY when viewing: KEY #Amendment: ALTER TABLE book ADD INDEX BkNameIdx ( bookname(30) ); #In the book table, create a common index on the year [publication] field. The SQL statement is as follows: CREATE TABLE book ( bookid INT NOT NULL, bookname ...

Posted by itshim on Wed, 29 Jan 2020 06:08:08 -0800

Take you to know Mybatis interceptor and handwriting paging plug-in

The principle of Mybatis interceptor is a bit convoluted and simple. The principle is to implement agents for our customized interceptor class through the dynamic agent technology of JDK, and there can be multiple agents. Therefore, Mybatis interceptor will exist in the form of a chain, and each agent w ...

Posted by ctsiow on Wed, 29 Jan 2020 03:10:09 -0800

Detailed explanation of various backup and restore postures of database

Cold and hot backup of database Data export is not exactly equal to data backup: Data export refers to the data in the database is conversed into SQL statements for export, so the export is SQL files. Often used to migrate data from one system to another in order to mask differences between systems Data backup refers to copying the relevant ...

Posted by bob2006 on Tue, 28 Jan 2020 04:46:16 -0800

Common methods of spring jdbctemplate class

execute(String  sql)    Any sql statement can be executed, but the return value is void, so it is generally used for database creation, modification, deletion and data table record addition, deletion and modification.     int  update(String sql)  int  update(String sql, Object...args) Add, delete, args passes the actual parameter, and retur ...

Posted by zapa on Mon, 27 Jan 2020 02:59:52 -0800

SQL statement instance application

Operation of database Linked database mysql -u root -proot -- Direct display of password is not recommended mysql -uroot -p Exit database exit/quit The sql statement needs a semicolon at the end; the end Show database version select version(); Display time select now(); View all databases ...

Posted by akumakeenta on Mon, 27 Jan 2020 02:17:50 -0800