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After the first two articles, we have almost prepared Crawling Ctrip ticket information: https://blog.csdn.net/weixin_42109012/article/details/96423081 Get Ctrip City abbreviation: https://blog.csdn.net/weixin_42109012/article/details/96378400 Now we need to change our copy request payload to set reques ...

List of reference resources Official document: https://docs.spring.io/spring-data/jpa/docs/2.1.5.RELEASE/reference/html/ Spring Data JPA introduction to mastery Preface JPA is the abbreviation of Java Persistence API. It is the second encapsulation framework of Spring based on Hibernate. In order to better and more convenient integrate int ...

Because of the work requirements, a large amount of data needs to be inserted into ORACLE data, and then the manual management of transaction opening is selected to insert a large amount of data. However, a pit is encountered here. Before the transaction management of mysql was opened to insert data, copying mysql is a bit impractical. Only 299 ...

What is heterogeneous data processing? Simply put, in order to satisfy the expansion of our business, data is transformed from a specific format to a new data format. Why does this need arise? In traditional enterprises, data are mainly stored in relational databases, such as MySQL, but in order to meet the expansion of demand, the dimension ...

The pit of PHP in_array ps: Should be the pit of weakly typed languages php document As the name implies, in_array is to find out whether a value is in an array. problem Assuming the scene of the accident The test code for an sql injection is as follows: $type = $_GET['type']; $types = [2,3,4,5,6]; if(!in_array($type, $types)) { throw new Para ...

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Following up the following article: Backup database for introduction to MySQL database Installation environment instructions System environment: [root@~]# cat /etc/redhat-release CentOS release 6.5 (Final) [root@~]# uname -r 2.6.32-431.el6.x86_64 Database: Because it is a simulated environment, the master and slave libraries are on the same se ...

os: centos 7.6 db: oracle 19.3 Preparation data Create table -- drop table tmp_t0; create table tmp_t0 ( id VARCHAR2(100), name VARCHAR2(100), memo VARCHAR2(100) ) ; -- drop table tmp_t1; create table tmp_t1 ( id VARCHAR2(100), name VARCHAR2(100) ) ; insert data insert into tmp_t0 val ...

Assignment: Return the name of the student who scored the highest mark for each course. t_score_data.txt zhangsan math:90,english:60 lisi chinese:80,math:66,english:77 wangwu chinese:66,math:55,english:80 Return the names of the students for each course and for the highest score chinese ...

 From: http://www.maomao365.com/?p=10025 Abstract: Following is the method of using sql script to generate Chinese names to share, as follows: Experimental environment: sql server 2008 R2 In our work, we sometimes need to generate random names in batches. The following will describe how to use sql scripts to generate random "names&qu ...