freesql with 语句

SqlSugarRepository.dll 全库开发框架支持 四种数据库：SqlServer、 MySql 、Oracle和Sqlite。

SqlSugarRepository是为全库开发而生的ORM框架，能够做到多种数据库之间的无间隙切换，在这一年多的时间里，园友提出的各种需求我都已经切切实实的去做了，做到了能力范围内的最好，一个不错的里程碑。同时也对未来有了更明确的规划，这只是开源的开始，Sugar ORM 还会有更多惊喜。

 

基于SqlSugar的开源CMS（百签软件出品）和SqlSugar官网 本月将开源 

 

 

主流ORM多库支持情况

Dapper 有多库访问组件，做不了同一个查询语句适用多种数据库。（select * from table这种除外）

EF  有多库访问组件，可以做到同一个查询适用多种数据库，但是命名空间引用不同需要自已用仓储实现多库

SqlSugarRepository 有多库访问组件，可以做到同一个查询适用多种数据库，已经实现内部工厂，比仓储模式的应变能力更强。

 

优点：

语法具有创新并且丰富

接近原生的性能

完整的学习文档

使用方便， Nuget直接搜索SqlSugarRepository下载便可，依赖dll都打包好了

Sugar ORM 所有成员

如果你只想操作一种数据库，可以针对不同数据库选择独立的dll

Asp.net 4.+	Asp.net Core	说明	依赖
SqlSugar.dll	SqlSugarCore.dll	SqlServer ORM	无
MysqlSugar.dll	MysqlSugarCore.dll	MySql ORM	MySql.Data.dll
SqliteSugar.dll	SqliteSugarCore.dll	Sqlite ORM	System.Data.SQLite.dll SQLite.Interop.dll（Core版不需要）
OracleSugar.dll	-	Oracle ORM	Oracle.ManagedDataAccess.dll
SqlSugarRepository.dll	-	SqlServer MySql Sqlite Oracle 四合一	MySql.Data.dll System.Data.SQLite.dll Oracle.ManagedDataAccess.dll SQLite.Interop.dll

 

数据库连接

普通模式

这种模式简单粗爆，适合一个产品支持多种数据库，但是中间没有两种数据库同时操作。

//普通连接
using (ISqlSugarClient idb = DbRepository.GetInstance(DbType.MySql, SugarDao.MySqlConnString))//DbRepository 框架现成的类，并非自定义

{ 
  var list = idb.Queryable<Student>().First(); 
}

 

灵活模式

适合多种数据库混用项目

//使用MyRepository连接数据库
using (MyRepository db = new MyRepository())
{
      //当前连接的sqlconn1
      var list = db.Database.Queryable<Student>().First();

      //切换mysqlconn1
      db.SetCurrent(db.MySqlConn1);
      var list2 = db.Database.Queryable<Student>().First(); ;

}

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using SqlSugarRepository;

namespace NewTest.Demos
{
    public class MyRepository:DbRepository
    {
        public ConnectionConfig SqlConn1 = new ConnectionConfig() { DbType = DbType.SqlServer, ConnectionString = SugarDao.SqlConnString1 };
        public ConnectionConfig SqlConn2 = new ConnectionConfig() { DbType = DbType.SqlServer, ConnectionString = SugarDao.SqlConnString2 };
        public ConnectionConfig MySqlConn1 = new ConnectionConfig() { DbType = DbType.MySql, ConnectionString = SugarDao.MySqlConnString };
    }
}

 MyRepository为自定义类继承 DbRepository

 

多库支持

统一参数关键词和Sqlparameter

不管操作哪个数据库关键词都是@并且用到Sqlparameter地方不需要切换成MySqlparameter这种，如下写法：

var student12 = db.Queryable<Student>().Where(c => c.name).Where("id>@id", new { id = 1 }).ToList();

db.SqlQuery<Student>("select * from Student where id=@id",new SqlParameter("@id","id"));

　　

复杂SQL的选择器

当ORM语法不能满足的时候我们就需要用到原生SQL或者存储过程，sqlbuilder可以根据当前连接哪种数据库返回相应的SQL语句。

string sql = db.SqlBuilder()
.ToSqlServer("select top 1 id,name from student ") 
.ToOracle("select id,name from student where rownum=1") 
.ToOther("select id,name from student limit 0,1").ToString(); 

var list = db.SqlQuery<string[]>(sql).SingleOrDefault();

 

返回类型的支持

Queryable返回类型支持四种 List<T>  Dynamic   JsonString  DataTable

var student = db.Queryable<Student>().ToList();
var studentDynamic = db.Queryable<Student>().ToDynamic();
var studentJson = db.Queryable<Student>().ToJson();
var studentTable = db.Queryable<Student>().ToDataTable();

还可以这么玩

var student = db.Queryable<Student>().Select<int>(it=>it.id).ToList();
var student2 = db.Queryable<Student>().Select<string[]>("*").ToList();
var student3 = db.Queryable<Student>().Select<Dictionary<string,object>>("id,name").ToList();

新类

var list1 = db.Queryable<Student>().Where(c => c.id < 10)
        .Select<V_Student>(c => new V_Student { id = c.id, AreaName = "默认地区" }).ToList();

匿名对象

var list2 = db.Queryable<Student>().Where(c => c.id < 10)
    .Select<V_Student>(c => new V_Student { id = c.id, AreaName = "默认地区" }).ToDynamic();

...

 

 

增删查改

查询

分页亮点

int pageCount = 0;                
var page = db.Queryable<Student>().Where(c => c.id > 1).OrderBy(it => it.id).ToPageList(pageIndex,pageSize,ref pageCount);

//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);
//查询单条根据主键
var singleByPk = db.Queryable<Student>().InSingle(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();
//查询所有的Id
var singleFieldList = db.Queryable<Student>().Select<int>(it=>it.id).ToList();

//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 
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(
            db.Sqlbuilder()
            .ToOracle("id>100 and id in( select 1 from dual)")
            .ToOther( "id>100 and id in( select 1)").ToString()
    ).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 listnew = db.Queryable<Student>().Where(it => intArray.Contains(it.name)).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();
var list6 = db.Queryable<Student>().In(intList).ToList();//不设置字段默认主键

//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 =SqlSugarTool.PackagingSQL(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 = queryable.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 =DbRepository.GetISugarQueryableByType<Student>(type).Where(it => it.id == 1);//声名没有connection对象的Queryable
db.SetDB(par);
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();



//拉姆达支持的函数操作
var par1 = "2015-1-1"; var par2 = "   我 有空格A, ";
var r1 = db.Queryable<Student>().Where(it => it.name == par1.ObjToString()).ToList(); //ObjToString会将null转转成""
var r2 = db.Queryable<InsertTest>().Where(it => it.d1 == par1.ObjToDate()).ToList();
var r3 = db.Queryable<InsertTest>().Where(it => it.id == 1.ObjToInt()).ToList();//ObjToInt会将null转转成0
var r4 = db.Queryable<InsertTest>().Where(it => it.id == 2.ObjToDecimal()).ToList();
var r5 = db.Queryable<InsertTest>().Where(it => it.id == 3.ObjToMoney()).ToList();
var r6 = db.Queryable<InsertTest>().Where(it => it.v1 == par2.Trim()).ToList();
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 => c.name == par2.ToLower()).ToList();
var convert4 = db.Queryable<Student>().Where(c => c.name == par2.ToUpper()).ToList();
var convert5= 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();
var c5 = db.Queryable<Student>().Where(c => c.name.Equals("小杰")).ToList();
var c6 = db.Queryable<Student>().Where(c => c.name.Length > 4).ToList();
var time = db.Queryable<InsertTest>().Where(c => c.d1>DateTime.Now.AddDays(1)).ToList();
var time2 = db.Queryable<InsertTest>().Where(c => c.d1 > DateTime.Now.AddYears(1)).ToList();
var time3 = db.Queryable<InsertTest>().Where(c => c.d1 > DateTime.Now.AddMonths(1)).ToList();

 

插入

插入单条
db.Insert(GetInsertItem()); //插入一条记录 (有主键也好，没主键也好，有自增列也好都可以插进去)

插入多条

db.InsertRange(GetInsertList()); //批量插入 支持（别名表等功能）
db.SqlBulkCopy(GetInsertList()); //批量插入 适合海量数据插入

设置不插入列

db.DisableInsertColumns = new string[] { "sex" };//sex列将不会插入值
Student s = new Student()
{
name = "张" + new Random().Next(1, int.MaxValue),
sex = "gril"
};var id = db.Insert(s); //插入
//查询刚插入的sex是否有值
var sex = db.Queryable<Student>().Single(it => it.id == id.ObjToInt()).sex;//无值
var name = db.Queryable<Student>().Single(it => it.id == id.ObjToInt()).name;//有值

//SqlBulkCopy同样支持不插入列设置
db.SqlBulkCopy(GetInsertList());

 

更新

//指定列更新
db.Update<School>(new { name = "蓝翔14" }, it => it.id == 14); //只更新name列
db.Update<School, int>(new { name = "蓝翔11 23 12", areaId = 2 }, 11, 23, 12);
db.Update<School, string>(new { name = "蓝翔2" }, new string[] { "11", "21" });
db.Update<School>(new { name = "蓝翔2" }, it => it.id == 100);
var array=new int[]{1,2,3};
db.Update<School>(new { name = "蓝翔2" }, it => array.Contains(it.id));// id in 1,2,3


//支持字典更新，适合动态权限
var dic = new Dictionary<string, string>();
dic.Add("name", "第十三条");
dic.Add("areaId", "1");
db.Update<School, int>(dic, 13);


//整个实体更新
db.Update(new School { id = 16, name = "蓝翔16", AreaId = 1 });
db.Update<School>(new School { id = 12, name = "蓝翔12", AreaId = 2 }, it => it.id == 18);
db.Update<School>(new School() { id = 11, name = "青鸟11" });

//设置不更新列
db.DisableUpdateColumns = new string[] { "CreateTime" };//设置CreateTime不更新

TestUpdateColumns updObj = new TestUpdateColumns()
{
    VGUID = Guid.Parse("542b5a27-6984-47c7-a8ee-359e483c8470"),
    Name = "xx",
    Name2 = "xx2",
    IdentityField = 0,
    CreateTime = null
};

//CreateTime将不会被更新
db.Update(updObj);
//以前实现这种更新需要用指定列的方式实现，现在就简单多了。



//批量更新   数据量小时建议使用
var updateResult = db.UpdateRange(GetUpdateList());

//批量更新  数据量大时建议使用
var updateResult2 = db.SqlBulkReplace(GetUpdateList2());


//更新字符串
db.Update<Student>("sch_id=sch_id+1", it => it.id == 1);


//清空禁止更新列
db.DisableUpdateColumns = null;
//新语法添加禁止更新列
db.AddDisableUpdateColumns("id", "name");//添加禁止更新列

 

删除

//删除根据主键
db.Delete<School, int>(10);

//删除根据表达示
db.Delete<School>(it => it.id > 100);//支持it=>array.contains(it.id)
 
//主键批量删除
db.Delete<School, string>(new string[] { "100", "101", "102" });

//非主键批量删除
db.Delete<School, string>(it => it.name, new string[] { "" });
db.Delete<School, int>(it => it.id, new int[] { 20, 22 });


//根据实体赋值实体一定要有主键，并且要有值。
db.Delete(new School() { id = 200 });

//根据字符串删除
db.Delete<School>("id=@id", new { id = 100 });

//假删除
//db.FalseDelete<school>("is_del", 100);
//等同于 update school set is_del=1 where id in(100)
//db.FalseDelete<school>("is_del", it=>it.id==100);

 

插入或者更新

//插入或者更新 NEW
//当主键值为 0 、sttring.Empty、NULL 或者 Guid.Empty时执行插操作，否则执行更新

db.AddDisableInsertColumns("UpdateTime");//禁止插入更新时间
db.AddDisableUpdateColumns("CreateTime");//禁止更新创建时间
db.InsertOrUpdate(GetInsertItem2());