mybatis xml mapper 文件中 if-else 写法

mybaits 中没有else要用chose when otherwise 代替

模板：

    insert into `business_user` (`id` , `user_type` , `user_login` )
    values
    
        
            
                
                    #{item.id,jdbcType=CHAR},
                
                
                    '',
                
            
            
                
                    #{item.userType,jdbcType=VARCHAR},
                
                
                    '',
                
            
        
    

 

    select
    
    from xxx
    where del_flag=0
    
        
            and xxx like concat(concat('%', #{xxx}), '%')
        
        
            and xxx like '**%'
        
    

 使用

 
    
        select `month` from business_development
        
            
                where topOrgCode = #{topOrgCode}
            
            
                where topOrgCode = #{topOrgCode} and code = #{orgCode}
            
        
        group by month order by month desc