Programmer Group

I. Installation environmentSystem environment: CentOS 6.5 IP:192.168.30.242 hostname:vpn.orgSoftware: PPTP and LAMP have been installed. Please ensure that these are installed properly and can be used.II. Software packagesppp-2.4.5.tar.gz, daloradius-0.9-8.tar.gz, go-pear.phar. These are just files that need to be downloaded separately. You can ...

After learning Laravel soon, there are many obstacles. We organize some understanding on Auth components, and rewrite some debugging process of encryption for MD5 in Auth component password authentication mode, and share it with other beginners of Laravel. Requirement description Because the project is an old one, some data need to be migrat ...

Explain During this period of time, the project changes a lot, often modify the table structure, and then all the environment databases are modified, accidentally forgot, and found that the table structure has not been updated until there is a problem; then look for the database version control tool; finally determine flyway. flyway descripti ...

Today we'll discuss how to use the big data development suite for incremental synchronization. We divide data that need synchronization into data that will change (personnel table, for example, personnel status will change) and data that will not change (usually log data) according to whether the data will change after writing. For these two sc ...

Catalog Classification of SQL statements DDL statement Classification of SQL statements DDL (Data Definition Languages) statement: Data Definition Language.These statements define different data segments, Definition of database objects such as databases, tables, columns, indexes, etc.Common statement ke ...

In the previous article< Detailed description of <environments> configuration elements for Mybatis configuration > We already know that there are two configurable elements, one is the configuration of data source and connection pool, and the other is the configuration of transaction manager. In the last article, we just described br ...

Preface The last Spring blog article mainly explained how to use Spring to implement AOP programming. This blog article mainly explained Spring's support for JDBC. For JDBC, we are certainly not unfamiliar, we must have written a lot of JDBC template code when we first learned! Review the process of template code optimization Let's recal ...

Recently, when using the system, users generally feedback a question: When switching responsibilities, it's very slow. It takes about 5 seconds. Sometimes it takes more than seven seconds. In the following figure, it often takes about 5 seconds to switch to another duty after the point is determined. How to deal with this problem? In fact ...

Debugging environment: ubuntu 16.04 Android sdk 7.1.1 / platform-tools sqlite3 (1) Creating database files Instead of creating db files manually, execute them directly from the command line: ~/test_sqlite$ sqlite3 test.db Go to the SQLIte command line and build tables directly using standard SQL: sqlite> create table test ...

When checking the consistency of the database, the following problems arise: DBCC CHECKDB(MyDB) DBCC CHECKTABLE (MyTable) /* MyTable DBCC results. Message 2570, level 16, status 3, line 1 Page (1:20239), slot 6 is located in object ID 1371151930, index ID 1, partition ID 72057594110345216, allocation unit ID 72057594130530304 (type "In ...