update

Update-Data.md

@@ -250,6 +250,20 @@ The benefits of using this program for dang complex update:
 - Data can be previewed before updating to prevent wrong update operations;
 - Support complex update operations, for example: Use `Limit(10)` on `ISelect` to update the first 10 records that meet the conditions;
 
+## 11、BulkCopy Batch Update
+
+FreeSql.Provider.SqlServer、FreeSql.Provider.MySqlConnector、FreeSql.Provider. PostgreSQL
+
+The extension methods ExecuteSqlBulkCopy, ExecuteMySqlBulkCopy, and ExecutePgCopy are implemented to implement batch update (v3.2.685)
+
+Principle: Use BulkCopy to insert data into the temporary table, and then use UPDATE FROM JOIN to update the associated table.
+
+Tip: When the number of updated fields exceeds 3000, the benefits are large.
+
+```csharp
+fsql.Update<T1>().SetSource(list).ExecuteSqlBulkCopy();
+```
+
 ## Reference
 
 - [《Database Transaction》](Database-Transaction)

修改.md

@@ -251,6 +251,20 @@ UPDATE `T1` SET Title = '111' WHERE id in (select a.id from T1 a left join Optio
 - 更新前可预览测试数据，防止错误更新操作；
 - 支持复杂的更新操作，例如：`ISelect` 上使用 `Limit(10)` 更新附合条件的前 10 条记录；
 
+## 11、BulkCopy 批量更新
+
+FreeSql.Provider.SqlServer、FreeSql.Provider.MySqlConnector、FreeSql.Provider.PostgreSQL 
+
+分别实现了扩展方法 ExecuteSqlBulkCopy、ExecuteMySqlBulkCopy、ExecutePgCopy 实现批量更新（v3.2.685）
+
+原理：使用 BulkCopy 将数据插入到临时表，再使用 UPDATE FROM JOIN 联表更新。
+
+提示：当更新的字段数量超过 3000 时，收益较大。
+
+```csharp
+fsql.Update<T1>().SetSource(list).ExecuteSqlBulkCopy();
+```
+
 ## 参考资料
 
 - [《数据库事务》](%e4%ba%8b%e5%8a%a1)