SqlSugar从1.0版本一直更新到3.0 ，使用该 ORM的人也越来越多，需求也越来越多，提出的需求和大家给我的建议的也都尽力满足。

并且 重构了EMIT和拉姆达解析，添加了无数的新功能，重新整了的GIT HUB上的DEMO，重新整理了所有注释。

完全基于SqlSugar的开源CMS http://www.baisoft.org/ 作者已经完成了后台并且将会开源。

SqlSugar 3.0 即将发布 现在版本 2.99

优点：

SqlSugar 是一款小巧，并且功能齐全的ORM，并不需要像Dapper一样依赖第三方扩展

SqlSugar 语法易用简单 ，有漂亮的拉姆达语法，也支持Dapper SQL和ADO.NET的所有功能

SqlSugar 性能达到原生水准，远超 Dapper和EF CORE。

SqlSugar 支持.NET CORE , 多个数据库

SqlSugar 体积小巧只有150K是EF的30分之1 ，NUGET直接可以下载

特色功能

SqlbulkCopy和SqlbulkReplace 这两个函数能够处理海量数据插入和更新 ，也是众多ORM没有集成的功能之一 

SQL日志功能 可以方便的对SQL进行监控和写入日志

全局过滤器  例如我都有IsDeleted来标识是否删 除， 这样我每查一个表就 要加一个WHERE条件 ，有了全局过滤器就变成非常方便

T4+实体生成 可以自定义实体格式 并且可以能过T4模版快速生成实体文件

POCO设计   实体类没有任何属性完全原生态

1、使用拉姆达进行查询

        //---------Queryable<T>,扩展函数查询---------//        //针对单表或者视图查询        //查询所有        var student = db.Queryable<Student>().ToList();        var studentDynamic = db.Queryable<Student>().ToDynamic();        var studentJson = db.Queryable<Student>().ToJson();        //查询单条        var single = db.Queryable<Student>().Single(c => c.id == 1);        //查询单条没有记录返回空对象        var singleOrDefault = db.Queryable<Student>().SingleOrDefault(c => c.id == 11111111);        //查询单条没有记录返回空对象        var single2 = db.Queryable<Student>().Where(c => c.id == 1).SingleOrDefault();        //查询第一条        var first = db.Queryable<Student>().Where(c => c.id == 1).First();        var first2 = db.Queryable<Student>().Where(c => c.id == 1).FirstOrDefault();        //取11-20条        var page1 = db.Queryable<Student>().Where(c => c.id > 10).OrderBy(it => it.id).Skip(10).Take(10).ToList();        //取11-20条 等于 Skip(pageIndex-1)*pageSize).Take(pageSize) 等于 between (pageIndex-1)*pageSize and pageIndex*pageSize        var page2 = db.Queryable<Student>().Where(c => c.id > 10).OrderBy(it => it.id).ToPageList(2, 10);        //查询条数        var count = db.Queryable<Student>().Where(c => c.id > 10).Count();        //从第2条开始以后取所有        var skip = db.Queryable<Student>().Where(c => c.id > 10).OrderBy(it => it.id).Skip(2).ToList();        //取前2条        var take = db.Queryable<Student>().Where(c => c.id > 10).OrderBy(it => it.id).Take(2).ToList();        // Not like         get='_blank'>string conval = "a";        var notLike = db.Queryable<Student>().Where(c => !c.name.Contains(conval.ToString())).ToList();        //Like        conval = "三";        var like = db.Queryable<Student>().Where(c => c.name.Contains(conval)).ToList();        //支持字符串Where 让你解决，更复杂的查询        var student12 = db.Queryable<Student>().Where(c => "a" == "a").Where("id>@id", new { id = 1 }).ToList();        var student13 = db.Queryable<Student>().Where(c => "a" == "a").Where("id>100 and id in( select 1)").ToList();        //存在记录反回true，则否返回false        bool isAny100 = db.Queryable<Student>().Any(c => c.id == 100);        bool isAny1 = db.Queryable<Student>().Any(c => c.id == 1);        //获取最大Id        object maxId = db.Queryable<Student>().Max(it => it.id);        int maxId1 = db.Queryable<Student>().Max(it => it.id).ObjToInt();//拉姆达        int maxId2 = db.Queryable<Student>().Max<int>("id"); //字符串写法        //获取最小        int minId1 = db.Queryable<Student>().Where(c => c.id > 0).Min(it => it.id).ObjToInt();//拉姆达        int minId2 = db.Queryable<Student>().Where(c => c.id > 0).Min<int>("id");//字符串写法        //order By         var orderList = db.Queryable<Student>().OrderBy("id desc,name asc").ToList();//字符串支持多个排序        //可以多个order by表达示        var order2List = db.Queryable<Student>().OrderBy(it => it.name).OrderBy(it => it.id, OrderByType.desc).ToList(); // order by name as ,order by id desc        //In        var intArray = new[] { "5", "2", "3" };        var intList = intArray.ToList();        var list0 = db.Queryable<Student>().In(it => it.id, 1, 2, 3).ToList();        var list1 = db.Queryable<Student>().In(it => it.id, intArray).ToList();        var list2 = db.Queryable<Student>().In("id", intArray).ToList();        var list3 = db.Queryable<Student>().In(it => it.id, intList).ToList();        var list4 = db.Queryable<Student>().In("id", intList).ToList();        //分组查询        var list7 = db.Queryable<Student>().Where(c => c.id < 20).GroupBy(it => it.sex).Select("sex,count(*) Count").ToDynamic();        var list8 = db.Queryable<Student>().Where(c => c.id < 20).GroupBy(it => it.sex).GroupBy(it => it.id).Select("id,sex,count(*) Count").ToDynamic();        List<StudentGroup> list9 = db.Queryable<Student>().Where(c => c.id < 20).GroupBy(it => it.sex).Select<StudentGroup>("Sex,count(*) Count").ToList();        List<StudentGroup> list10 = db.Queryable<Student>().Where(c => c.id < 20).GroupBy("sex").Select<StudentGroup>("Sex,count(*) Count").ToList();        //SELECT Sex,Count=count(*) FROM Student WHERE 1=1 AND (id < 20)  GROUP BY Sex --生成结果        //2表关联查询        var jList = db.Queryable<Student>()        .JoinTable<School>((s1, s2) => s1.sch_id == s2.id) //默认left join        .Where<School>((s1, s2) => s1.id == 1)        .Select("s1.*,s2.name as schName")        .ToDynamic();        /*等于同于         SELECT s1.*,s2.name as schName         FROM [Student] s1         LEFT JOIN [School] s2 ON s1.sch_id = s2.id         WHERE s1.id = 1 */        //2表关联查询并分页        var jList2 = db.Queryable<Student>()        .JoinTable<School>((s1, s2) => s1.sch_id == s2.id) //默认left join          //如果要用inner join这么写          //.JoinTable<School>((s1, s2) => s1.sch_id == s2.id ,JoinType.INNER)        .Where<School>((s1, s2) => s1.id > 1)        .OrderBy(s1 => s1.name)        .Skip(10)        .Take(20)        .Select("s1.*,s2.name as schName")        .ToDynamic();        //3表查询并分页        var jList3 = db.Queryable<Student>()        .JoinTable<School>((s1, s2) => s1.sch_id == s2.id) // left join School s2 on s1.id=s2.id        .JoinTable<School>((s1, s3) => s1.sch_id == s3.id) // left join School s3 on s1.id=s3.id        .Where<School>((s1, s2) => s1.id > 1) // where s1.id>1        .Where(s1 => s1.id > 0)        .OrderBy<School>((s1, s2) => s1.id) //order by s1.id 多个order可以 .oderBy().orderby 叠加         .Skip(10)        .Take(20)        .Select("s1.*,s2.name as schName,s3.name as schName2")//select目前只支持这种写法        .ToDynamic();        //上面的方式都是与第一张表join，第三张表想与第二张表join写法如下        List<V_Student> jList4 =         db.Queryable<Student>()         .JoinTable<School>((s1, s2) => s1.sch_id == s2.id) // left join School s2 on s1.id=s2.id         .JoinTable<School, Area>((s1, s2, a1) => a1.id == s2.AreaId)// left join Area a1 on a1.id=s2.AreaId 第三张表与第二张表关联         .JoinTable<Area, School>((s1, a1, s3) => a1.id == s3.AreaId)// left join School s3 on a1.id=s3.AreaId 第四第表第三张表关联         .JoinTable<School>((s1, s4) => s1.sch_id == s4.id) // left join School s2 on s1.id=s4.id         .Select<School, Area, V_Student>((s1, s2, a1) => new V_Student { id = s1.id, name = s1.name, SchoolName = s2.name, AreaName = a1.name }).ToList();        //等同于        //SELECT id = s1.id, name = s1.name, SchoolName = s2.name, AreaName = a1.name         //FROM [Student]  s1         //LEFT JOIN School s2 ON ( s1.sch_id = s2.id )          //LEFT JOIN Area a1 ON ( a1.id = s2.AreaId )   //第三张表与第二张表关联        //LEFT JOIN School s3 ON ( a1.id = s3.AreaId )  //第四张表与第三张表关联        //LEFT JOIN School s4 ON ( s1.sch_id = s4.id )          //WHERE 1=1          //Join子查询语句加分页的写法        var childQuery = db.Queryable<Area>().Where("id=@id").Select(it => new { id = it.id }).ToSql();//创建子查询SQL        string childTableName = string.Format("({0})", childQuery.Key);//将SQL语句用()包成表        var queryable = db.Queryable<Student>()         .JoinTable<School>((s1, s2) => s1.sch_id == s2.id) //LEFT JOIN School s2 ON ( s1.sch_id = s2.id )          .JoinTable(childTableName, "a1", "a1.id=s2.areaid", new { id = 1 }, JoinType.INNER) //INNER JOIN (SELECT * FROM [Area]  WHERE 1=1 AND id=@id  ) a1 ON a1.id=s2.areaid         .OrderBy(s1 => s1.id);        var list = queryable.Select<School, Area, V_Student>((s1, s2, a1) => new V_Student { id = s1.id, name = s1.name, SchoolName = s2.name, AreaName = a1.name })          .ToPageList(0, 200);        var count2 = list.Count;        //拼接例子        var queryable2 = db.Queryable<Student>().Where(it => true);        if (maxId.ObjToInt() == 1)        {          queryable2.Where(it => it.id == 1);        }        else        {          queryable2.Where(it => it.id == 2);        }        var listJoin = queryable2.ToList();        //queryable和SqlSugarClient解耦        var par = new Queryable<Student>().Where(it => it.id == 1);//声名没有connection对象的Queryable        par.DB = db;        var listPar = par.ToList();        //查看生成的sql和参数        var id = 1;        var sqlAndPars = db.Queryable<Student>().Where(it => it.id == id).OrderBy(it => it.id).ToSql();        //条件函数的支持(字段暂不支持函数,只有参数支持) 目前只支持这么多        var par1 = "2015-1-1"; var par2 = "  我 有空格, ";        var r1 = db.Queryable<Student>().Where(it => it.name == par1.ObjToString()).ToSql(); //ObjToString会将null转转成""        var r2 = db.Queryable<InsertTest>().Where(it => it.d1 == par1.ObjToDate()).ToSql();        var r3 = db.Queryable<InsertTest>().Where(it => it.id == 1.ObjToInt()).ToSql();//ObjToInt会将null转转成0        var r4 = db.Queryable<InsertTest>().Where(it => it.id == 2.ObjToDecimal()).ToSql();        var r5 = db.Queryable<InsertTest>().Where(it => it.id == 3.ObjToMoney()).ToSql();        var r6 = db.Queryable<InsertTest>().Where(it => it.v1 == par2.Trim()).ToSql();        var convert1 = db.Queryable<Student>().Where(c => c.name == "a".ToString()).ToList();        var convert2 = db.Queryable<Student>().Where(c => c.id == Convert.ToInt32("1")).ToList();//         var convert3 = db.Queryable<Student>().Where(c => DateTime.Now > Convert.ToDateTime("2015-1-1")).ToList();        var c1 = db.Queryable<Student>().Where(c => c.name.Contains("a")).ToList();        var c2 = db.Queryable<Student>().Where(c => c.name.StartsWith("a")).ToList();        var c3 = db.Queryable<Student>().Where(c => c.name.EndsWith("a")).ToList();        var c4 = db.Queryable<Student>().Where(c => !string.IsNullOrEmpty(c.name)).ToList();

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原标题：开源ORM框架 SqlSugar 3.0的巨大变化

关键词：sql