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## SqlSugar ORM
SqlSugar ORM is a library providing Object/Relational Mapping (ORM)
An ORM framework from the future
Using SqlSugar is very simple , And it's powerful.
## Description
- Support SqlServer、MySql and Oracle insert blukcopy
- Split table big data self-processing
- Support Multi-tenant, multi-library transactions
- Support Support CodeFirst data migration.
- Support Join query 、 Union all 、 Subquery
- Support Configure the query
- Support DbFirst import entity class from database, or use Generation Tool.
- Support one-to-many and many-to-many navigation properties
- Support MySql、SqlServer、Sqlite、Oracle 、 postgresql 、达梦、人大金仓 、神通数据库
## Documentation
|Other |Select | Insert | Update | Delete|
| ----- | --------- | ----------- | ------- |------- |
Nuget| [Simple query](https://www.donet5.com/Home/Doc?typeId=1187) | Insert |Update| Delete |
[Start guide](https://github.com/donet5/SqlSugar/wiki/Create--database-operation-object)| Join query | | | | |
## Feature characteristic
### Feature1 : Join query
Super simple query syntax
```cs
var query5 = db.Queryable()
.LeftJoin ((o, cus) => o.CustomId == cus.Id)
.LeftJoin ((o, cus, oritem ) => o.Id == oritem.OrderId)
.LeftJoin ((o, cus, oritem , oritem2) => o.Id == oritem2.OrderId)
.Where(o => o.Id == 1)
.Select((o, cus) => new ViewOrder { Id = o.Id, CustomName = cus.Name })
.ToList();
```
```sql
SELECT
[o].[Id] AS [Id],
[cus].[Name] AS [CustomName]
FROM
[Order] o
Left JOIN [Custom] cus ON ([o].[CustomId] = [cus].[Id])
Left JOIN [OrderDetail] oritem ON ([o].[Id] = [oritem].[OrderId])
Left JOIN [OrderDetail] oritem2 ON ([o].[Id] = [oritem2].[OrderId])
WHERE
([o].[Id] = @Id0)
```
### Feature2 : Page query
```cs
int pageIndex = 1;
int pageSize = 20;
int totalCount=0;
var page = db.Queryable().ToPageList(pageIndex, pageSize, ref totalCount);
```
### Feature3 : Dynamic expression
```cs
var names= new string [] { "a","b"};
Expressionable exp = new Expressionable();
foreach (var item in names)
{
exp.Or(it => it.Name.Contains(item.ToString()));
}
var list= db.Queryable().Where(exp.ToExpression()).ToList();
```
```sql
SELECT [Id],[Name],[Price],[CreateTime],[CustomId]
FROM [Order] WHERE (
([Name] like '%'+ CAST(@MethodConst0 AS NVARCHAR(MAX))+'%') OR
([Name] like '%'+ CAST(@MethodConst1 AS NVARCHAR(MAX))+'%')
)
```
### Feature4 : Multi-tenant transaction
```cs
//Creaate database object
SqlSugarClient db = new SqlSugarClient(new List()
{
new ConnectionConfig(){ ConfigId="0", DbType=DbType.SqlServer, ConnectionString=Config.ConnectionString, IsAutoCloseConnection=true },
new ConnectionConfig(){ ConfigId="1", DbType=DbType.MySql, ConnectionString=Config.ConnectionString4 ,IsAutoCloseConnection=true}
});
var mysqldb = db.GetConnection("1");//mysql db
var sqlServerdb = db.GetConnection("0");// sqlserver db
db.BeginTran();
mysqldb.Insertable(new Order()
{
CreateTime = DateTime.Now,
CustomId = 1,
Name = "a",
Price = 1
}).ExecuteCommand();
mysqldb.Queryable().ToList();
sqlServerdb.Queryable().ToList();
db.CommitTran();
```
### Feature5 : Singleton Pattern
Implement transactions across methods
```CS
public static SqlSugarScope Db = new SqlSugarScope(new ConnectionConfig()
{
DbType = SqlSugar.DbType.SqlServer,
ConnectionString = Config.ConnectionString,
IsAutoCloseConnection = true
},
db=> {
db.Aop.OnLogExecuting = (s, p) =>
{
Console.WriteLine(s);
};
});
using (var tran = Db.UseTran())
{
new Test2().Insert(XX);
new Test1().Insert(XX);
.....
....
tran.CommitTran();
}
```
### Feature6 : Query filter
```cs
//set filter
db.QueryFilter.Add(new TableFilterItem(it => it.Name.Contains("a")));
db.Queryable().ToList();
//SELECT [Id],[Name],[Price],[CreateTime],[CustomId] FROM [Order] WHERE ([Name] like '%'+@MethodConst0+'%')
db.Queryable((i, o) => i.OrderId == o.Id)
.Where(i => i.OrderId != 0)
.Select("i.*").ToList();
//SELECT i.* FROM [OrderDetail] i ,[Order] o WHERE ( [i].[OrderId] = [o].[Id] ) AND
//( [i].[OrderId] <> @OrderId0 ) AND ([o].[Name] like '%'+@MethodConst1+'%')
```
### Feature7 : Insert or update
insert or update
```cs
var x = Db.Storageable(list2).ToStorage();
x.AsInsertable.ExecuteCommand();
x.AsUpdateable.ExecuteCommand();
```
insert into not exists
```cs
var x = Db.Storageable(list).SplitInsert(it => !it.Any()).ToStorage()
x.AsInsertable.ExecuteCommand();
```
### Feature8 ：Auto split table
```cs
//entity
[SplitTable(SplitType.Year)]//按年分表 （自带分表支持 年、季、月、周、日）
[SugarTable("SplitTestTable_{year}{month}{day}")]//生成表名格式 3个变量必须要有
public class SplitTestTable
{
[SugarColumn(IsPrimaryKey =true)]
public long Id { get; set; }
public string Name { get; set; }
[SplitField] //分表字段 在插入的时候会根据这个字段插入哪个表，在更新删除的时候也能可方便的用这个字段找出相关表
public DateTime CreateTime { get; set; }
}
//split query
var lis2t = db.Queryable()
.SplitTable(DateTime.Now.Date.AddYears(-1), DateTime.Now)
.ToPageList(1,2);
```