SQL Server快速向表中插入200万条数据

SQL Server快速向表中插入200万条测试数据 

USE master
go

IF EXISTS (SELECT  * FROM  sysdatabases WHERE name='DBAdmin' )
DROP DATABASE DBAdmin
GO

CREATE DATABASE DBAdmin
go

USE DBAdmin;
GO
/*
Setup script to create the sample table and fill it with
sample data.
*/

CREATE TABLE [dbo].[Customers]
(
    [CustomerID] [INT] IDENTITY(1, 1) NOT NULL,
    [CustomerNumber] [CHAR](8) NULL,
    [CustomerName] [VARCHAR](50) NULL,
    [CustomerCity] [VARCHAR](20) NULL,
    CONSTRAINT [PK_Customers]
        PRIMARY KEY CLUSTERED ([CustomerID] ASC)
) ON [PRIMARY];
GO

TRUNCATE TABLE Customers;
GO

DBCC DROPCLEANBUFFERS;
DBCC FREEPROCCACHE;
GO
;
/*****运用CTE递归插入，速度较快，邀月注***********************/
WITH Seq (num, CustomerNumber, CustomerName, CustomerCity)
AS (SELECT 1,
           CAST('00000000' AS CHAR(8)),
           CAST('Customer 0' AS NVARCHAR(50)),
           CAST('X-City' AS NVARCHAR(20))
    UNION ALL
    SELECT num + 1,
           CAST(REPLACE(STR(num, 8), ' ', '0') AS CHAR(8)),
           CAST('Customer ' + STR(num, 8) AS NVARCHAR(50)),
           CAST(CHAR(65 + (num % 26)) + '-City' AS NVARCHAR(20))
    FROM Seq
    WHERE num <= 2000000)
INSERT INTO Customers
(
    CustomerNumber,
    CustomerName,
    CustomerCity
)
SELECT CustomerNumber,
       CustomerName,
       CustomerCity
FROM Seq
OPTION (MAXRECURSION 0);