Course Intermediate 11251
Course Introduction:"Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.
Course Advanced 17584
Course Introduction:"Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.
Course Advanced 11299
Course Introduction:"Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.
Insert data if and only if there is no duplicate data in the mysql database
2023-09-13 18:17:33 0 1 498
Course Introduction:There is a parameterType attribute in the select, insert, update, and delete elements in the Mybatis Mapper file, which is used for the parameter type accepted by the corresponding mapper interface method. Acceptable parameter types are basic types and complex types. The mapper interface method generally accepts one parameter, and you can bind multiple parameters to a map as input parameters by using the @Param annotation. Simple data type mapper interface method: 1User selectByPrim...
2017-06-13 comment 0 8614
Course Introduction:When we insert data in batches, we need to obtain the ID of the inserted data. so: <insert id="insertUser" parameterType="gys.entity.User" keyProperty="userId" useGeneratedKeys="true"> INSERT INTO `user` (userName) VALUES
2017-06-21 comment 0 1308
Course Introduction:A method is a block of code that performs a specific task. Structure of the Method public returnType methodName(parameterType parameterName) { // Method body (code to be executed) } Let's break down this public: public is the Access Modifie
2024-10-02 comment 0 821