SqlSugar/README.md

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🍬SqlSugar

SqlSugar ORM is a library providing Object/Relational Mapping (ORM) support to applications, libraries, and frameworks.

Using SqlSugar is very simple , And it's powerful.

• 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

🍳Join query

Super simple query syntax

var query5 = db.Queryable<Order>()
            .LeftJoin<Custom>  ((o, cus) => o.CustomId == cus.Id)
            .LeftJoin<OrderItem> ((o, cus, oritem ) => o.Id == oritem.OrderId)
            .LeftJoin<OrderItem> ((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();   

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)