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xlrd xlrd is a third-party module used to read excle tables in python. Many enterprises use tables to manage data before using computer management, so importing tables is very common! Install xlrd pip install xlrd Analysis of excel structure An excle table contains multiple sheet s A sheet contains multiple rows and columns E ...

To learn things, we need to integrate knowledge with practice. If we only know the theory but never practice it, we will not have a solid grasp of it. It is estimated that we will forget it in a few days. Next, we will practice together to learn the propagation properties of Spring transactions. Propagation attribute The propagation attribute ...

nodejs related modules Get web content (httprequestsuperior, etc.) Filter web information (cheerio) Output or store information (consolesmongodbmysql, etc.) 1. Use the request module to obtain the web page content var request = require('request'); // Read the content of http://cnodejs.org/ through GET request request('http://cnodejs.org ...

I. Introduction to dynamic SQL   dynamic SQL is the most powerful function of MyBatis, in essence, splicing SQL statements according to conditions.   I always thought that dynamic SQL was only supported by the configuration of XxxMapper.xml, but I didn't expect that MyBatis in the annotation v ...

0x00 Preface This article records my way of learning, directly into the body. 0x01 text Why does SQL injection occur? For me, it will be summed up as one sentence: "the SQL statement executed by dynamic splicing contains untrusted data." What is dynamic splicing? Look at the following SQL ...

Knowledge background Background reference website: https://www.cnblogs.com/luoyx/p/5896419.html (I'll copy it below if I have time) Open MySQL binlog Barbara Full backup and recovery in dump mode Barbara Incremental backup and recovery using binlog Barbara     JAVA implementation Realize f ...

Python&MySQL Catalog Python&MySQL Introduction 1.1 database classification Two MySQL 2.1 grammar Overview of 2.1.1 2.1.2 add data 2.1.3 delete data 2.1.4 change data 2.2 MySQL DB module 2.2.1 connecting to the database 2.2.2 close database 2.2.3 query data 2.2.4 add data Three ORM 3. ...

Package of binding function code org.apache.ibatis.binding binding module function Encapsulating ibatis programming model In the ibatis programming model, SqlSession is the entry of sql execution. The practical method is sqlSession.selectOne(namespace+id, parameter list) (for example, sqlSession.selectOne("com.enjoylearning.mybatis.mapper ...

In SQL Server, we often meet some requirements. We need to search whether objects such as procedures and functions contain an object or involve an object. For example, I need to find out whether those stored procedures and functions call LINKED SERVER. If we search from sys.sql modules, we need to search for multiple functions. The user databas ...

I wrote a blog before“ Can the last index rebuild time be accurately obtained in SQL Server? ", which mainly deals with three questions: can we find the creation time of the index? When was the last index rebuild? When was the last index reorganize? At that time, we came to the conclusion that the answer was that we could not accurat ...