ExecuteNonQuery 删除近7000条记录耗时较多，如何提高性能？

Question

我正在使用 ADO.NET 执行以下查询。执行需要将近60s。同时我在SQL Server management studio 运行查询时，只用了1秒。为什么会有如此大的差异？我该如何提高性能？

我也尝试了存储过程。它也需要将近 60 秒。

SqlCommand sc = new SqlCommand(@"
BEGIN TRAN

BEGIN TRY

DELETE FROM [dbo].[Table1]
  WHERE ID = @Id ; -- nearly 600 records

DELETE FROM [dbo].[Table2]
  WHERE ID = @Id ; -- nearly 6500 records

DELETE FROM [dbo].[Table3]
  WHERE ID = @Id;  -- 1 record


COMMIT TRAN
END TRY
BEGIN CATCH

ROLLBACK TRAN
THROW
END CATCH
");

Answer 1

我在下面试过了。这是由于参数嗅探而发生的。为了克服这个问题，有4种方法

选项（重新编译）
选项（优化（@VARIABLE=VALUE））
选项（优化（@VARIABLE UNKNOWN））
使用局部变量

下面我使用了第四种方法来解决这个问题。 referred

SqlCommand sc = new SqlCommand(@"
BEGIN TRAN

BEGIN TRY
Declare @Id int = @PId ; -- passing the parameter only here
DELETE FROM [dbo].[Table1]
WHERE ID = @Id ; -- nearly 600 records

DELETE FROM [dbo].[Table2]
WHERE ID = @Id ; -- nearly 6500 records

DELETE FROM [dbo].[Table3]
WHERE ID = @Id;  -- 1 record


COMMIT TRAN
END TRY
BEGIN CATCH

ROLLBACK TRAN
THROW
END CATCH
");

感谢大家做出更好的回答

ExecuteNonQuery 删除近7000条记录耗时较多，如何提高性能？

ExecuteNonQuery Takes more time to delete nearly 7000 records, How can I improve performance?

c#

sql-server

ado.net