1:设置mysql原生分页 # 监控系统首页显示分页 def MyPagination(limitid,offsetid): limitid =str(limitid) offsetid =str(offsetid) # 这里是mysql原生代码 show_goods = "select dal_keywordtable.* from (select asin, min(ranking) as minRanking from `dal_keywordtable` GROUP BY asin) t
我的技术博客经常被流氓网站恶意爬取转载.请移步原文:http://www.cnblogs.com/hamhog/p/3558663.html,享受整齐的排版.有效的链接.正确的代码缩进.更好的阅读体验. [默认格式] public class MyClass implements Serializable{ ...} 序列化: ObjectOutputStream output = new ObjectOutputStream(new FileOutputStream(outputPath));
上期内容回顾 聚合查询和分组查询 # 聚合查询 max min sum avg count # 查询关键字:aggregate from django.db.models import Max, Min, Sum, Avg, Count res = Book.objects.aggregate(max_price=Max('price'), ) # 分组查询 group by """ 默认情况下,分组之后依然可以查询到所有的字段数据,如果设置为了严格模式,只能获取到分组的那个
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; using System.Runtime.Serialization.Json; using System.Xml.Serialization; using System.Web.Script.Serialization; namespace Common { public class Jso
