【面试题】简述Mybatis的动态SQL是什么意思

简述Mybatis的动态SQL是什么意思

1. Mybatis提供的动态SQL不同于传统的SQL拼接，可有效防止语句错误。
2. Mybatis实现动态SQL的元素有 if、choose、when、otherwise、trim、where、set、foreach

代码示例：

    select * from t_blog where 1 = 1
    
        and title = #{title}
    
    
        and content = #{content}
    
    
        and owner = #{owner}
    

    select * from t_blog where 1 = 1 
    
        
                and title = #{title}
        
        
            and content = #{content}
        
        
            and owner = "owner1"
        
    

    select * from t_blog where id in
    
        #{item}