Update README.md

README.md

@@ -1,4 +1,6 @@
-# SqlSugar 4.X
+# SqlSugar 4.X  API
+
+3.X https://github.com/sunkaixuan/SqlSugar/tree/master
 
 ##  1. Query
 
@@ -132,3 +134,49 @@ var t3 = db.Ado.GetDataTable("select 1 as id");
 //db.Ado.GetXXX...
  ```
  
+##  2. Insert
+ ```c
+var insertObj = new Student() { Name = "jack", CreateTime = Convert.ToDateTime("2010-1-1") ,SchoolId=1};
+
+//Insert reutrn Insert Count
+var t2 = db.Insertable(insertObj).ExecuteCommand();
+
+//Insert reutrn Identity Value
+var t3 = db.Insertable(insertObj).ExecuteReutrnIdentity();
+
+
+//Only  insert  Name 
+var t4 = db.Insertable(insertObj).InsertColumns(it => new { it.Name,it.SchoolId }).ExecuteReutrnIdentity();
+
+
+//Ignore TestId
+var t5 = db.Insertable(insertObj).IgnoreColumns(it => new { it.Name, it.TestId }).ExecuteReutrnIdentity();
+
+
+//Ignore   TestId
+var t6 = db.Insertable(insertObj).IgnoreColumns(it => it == "Name" || it == "TestId").ExecuteReutrnIdentity();
+
+
+//Use Lock
+var t8 = db.Insertable(insertObj).With(SqlWith.UpdLock).ExecuteCommand();
+
+
+var insertObj2 = new Student() { Name = null, CreateTime = Convert.ToDateTime("2010-1-1") };
+var t9 = db.Insertable(insertObj2).Where(true/* Is insert null */, true/*off identity*/).ExecuteCommand();
+
+//Insert List<T>
+var insertObjs = new List<Student>();
+for (int i = 0; i < 1000; i++)
+{
+ insertObjs.Add(new Student() { Name = "name" + i });
+}
+var s9 = db.Insertable(insertObjs.ToArray()).InsertColumns(it => new { it.Name }).ExecuteCommand();
+```
+##  3. Delete
+
+ ```c
+ ```
+ ##  3. Update
+
+ ```c
+ ```