PG 实现 Dynamic SQL】的更多相关文章

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…
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…
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…
Dynamic SQL Store Procedure: Note: use variable,you need convert varchar and as a variable,not directly use variable,like this: '+convert(varchar(10),@init_column)+'    '+@the_column_name+' create procedure sp_getgoodlocationviaplatoon @the_platoon i…
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…
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…
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…
SET @sql = (SELECT IF( (SELECT COUNT(*) FROM usher_network_log ) > 1000000, "SELECT 0", "select * from Configuration")); PREPARE stmt FROM @sql;EXECUTE stmt;DEALLOCATE PREPARE stmt;…
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…