Although MyBatis was designed to execute the query after it builds it, you can make use of it's configuration and a little bit of "inside knowledge" to get to what you need. MyBatis is a very nice framework, unfortunately it lacks on the documen…

Sometimes, static SQL queries may not be sufficient for application requirements. We may have to build queries dynamically, based on some criteria.For example, in web applications there could be search screens that provide one or more input options a…

前言:通过阅读源码对实现机制进行了解有利于陶冶情操,承接前文Spring mybatis源码篇章-XMLLanguageDriver解析sql包装为SqlSource SqlNode接口类 public interface SqlNode { boolean apply(DynamicContext context); } 内部只有一个接口方法apply,从字面上来看应该是后续在解析具体的sql语句时应用的方法 NodeHandler接口类 该类的作用是具体解析相应的sql节点为对应的SqlNo…

reference: http://www.mybatis.org/mybatis-3/dynamic-sql.html Dynamic SQL One of the most powerful features of MyBatis has always been its Dynamic SQL capabilities. If you have any experience with JDBC or any similar framework, you understand how pain…

The idea of using dynamic SQL is to execute SQL that will potentially generate and execute another SQL statement. While querying data, you might want to dynamically set columns you would like to query. On the other hand, you might want to parametrize…

Dynamic SQL One of the most powerful features of MyBatis has always been its Dynamic SQL capabilities. If you have any experience with JDBC or any similar framework, you understand how painful it is to conditionally concatenate strings of SQL togethe…

[转自http://blog.csdn.net/mysingle/article/details/678598]开发说明:在SAP的系统维护过程中,有时我们需要修改一些Table中的数据,可是很多Table又不能直接在Tcode:SE16中修改,使用的SAP ID又没有调试数据修改权限,这时我们应该怎么样修改数据呢?思路--> ABAP程序中的SQL 更新语句谁都有权限执行,只要我们能动态生成修改该Table字段的ABAP CODE动态执行即可!   开发技术: 1.SQL代码编写技术 1.动态…

转自:http://www.sqlusa.com/bestpractices/training/scripts/dynamicsql/ Dynamic SQL & Stored Procedure Usage in T-SQL Important security article related to dynamic SQL: How To: Protect From SQL Injection in ASP.NET ------------ -- Dynamic SQL QUICK SYNTA…

最近一直做项目,博文很长时间没有更新了,今天抽空,学习了一下mybatis,并且总结一下.在前面的博文中,小编主要简单的介绍了mybatis中的输入和输出映射,并且通过demo简单的介绍了输入映射和输出映射,今天这篇博文,小编主要来简单的介绍一下mybatis中的动态sql,有的小伙伴会问,既然有动态sql,那是不是也应该存在静态sql,答案是肯定的.那么什么是静态sql呢,静态sql语句一般用于嵌入式sql应用中,在程序运行之前,sql语句必须是确定的,例如sql语句中涉及的列名和表名必须是存…

Mybatis入门之动态sql 通过mybatis提供的各种标签方法实现动态拼接sql. 1.if.where.sql.include标签(条件.sql片段) <sql id="selector"> select * from account </sql> <!--根据性别和名称查询用户 where标签可以去掉第一个前and --> <select id="selectUserBySexAndUsername" parame…