SQL 資料插入 刪除 大資料

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幾種資料庫的大資料批量插入: 

--測試表

create table [dbo].[employee] (
[employeeno] int primary key,
[employeename] [nvarchar](50) null,
[createuser] [nvarchar](50) null,
[createdatetime] [datetime] null
);

--1、迴圈插入

set statistics time on;
declare @index int = 1;
declare @timer datetime = getdate();
while @index <= 100000
begin
insert [dbo].[employee](employeeno, employeename, createuser, createdatetime) values(@index, 'employee_' + cast(@index as char(6)), 'system', getdate());
set @index = @index + 1;
endselect datediff(ms, @timer, getdate()) as [執行時間(毫秒)];
set statistics time off;

--2、事務迴圈

begin tran;
set statistics time on;
declare @index int = 1;
declare @timer datetime = getdate();
while @index <= 100000
begin
insert [dbo].[employee](employeeno, employeename, createuser, createdatetime) values(@index, 'employee_' + cast(@index as char(6)), 'system', getdate());
set @index = @index + 1;
endselect datediff(ms, @timer, getdate()) as [執行時間(毫秒)];
set statistics time off;
commit;
--3、批量插入

set statistics time on;

declare @timer datetime = getdate();
insert [dbo].[employee](employeeno, employeename, createuser, createdatetime)
select top(100000) employeeno = row_number() over (order by c1.[object_id]), 'employee_', 'system', getdate()
from sys.columns as c1 cross join sys.columns as c2
order by c1.[object_id]
select datediff(ms, @timer, getdate()) as [執行時間(毫秒)];
set statistics time off;
--4、cet插入

set statistics time on;

declare @timer datetime = getdate();
;with cte(employeeno, employeename, createuser, createdatetime) as(
select top(100000) employeeno = row_number() over (order by c1.[object_id]), 'employee_', 'system', getdate()
from sys.columns as c1 cross join sys.columns as c2
order by c1.[object_id]
)insert [dbo].[employee] select employeeno, employeename, createuser, createdatetime from cte;
select datediff(ms, @timer, getdate()) as [執行時間(毫秒)];
set statistics time off;
--5、迴圈刪除

set statistics time on;

declare @timer datetime = getdate();
delete from [dbo].[employee];
select datediff(ms, @timer, getdate()) as [執行時間(毫秒)];
set statistics time off;
--6、批量刪除

set statistics time on;

declare @timer datetime = getdate();
set rowcount 100000;
while 1 = 1
begin
begin tran
delete from [dbo].[employee];
commit
if @@rowcount = 0
break;
endset rowcount 0;
select datediff(ms, @timer, getdate()) as [執行時間(毫秒)];
set statistics time off;
--6、truncate刪除

set statistics time on;

declare @timer datetime = getdate();
truncate table [dbo].[employee];
select datediff(ms, @timer, getdate()) as [執行時間(毫秒)];
set statistics time off;

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