批量update
参见http://lj.soft.blog.163.com/blog/static/7940248120109215191358/
例子:update CarSeriesDetail set clicks= case when id=1 then 1 when id=2 then 2 else clicks end
参见http://lj.soft.blog.163.com/blog/static/7940248120109215191358/
例子:update CarSeriesDetail set clicks= case when id=1 then 1 when id=2 then 2 else clicks end