2008 sql 揭秘 第4章的数据库脚本

Posted 2021-03-03 夏风微凉

SET NOCOUNT ON;
USE master;
IF DB_ID(‘Performance‘) IS NULL
CREATE DATABASE performance;
GO
USE Performance;
GO
--创建和填充数字辅助表
SET NOCOUNT ON;
IF OBJECT_ID( ‘dbo.Nums‘,‘U‘) IS NOT NULL
    DROP TABLE dbo. Nums ;
CREATE TABLE dbo.Nums(n INT NOT NULL PRIMARY KEY) ;
DECLARE @max AS INT, @rc AS INT;
SET @max = 1000000;
SET @rc = 1;

INSERT INTO dbo .Nums(n) VALUES(1);
WHILE @rc *2<= @max
BEGIN
insert into dbo.Nums(n) select n+@rc from dbo.Nums
set @rc=@rc *2
END
INSERT INTO dbo.Nums(n)
 SELECT n+@rc FROM dbo.Nums WHERE n+ @rc<=@max;
GO
--如果数据表存在，时先删除
if oBJECT_ID(‘dbo.Emporders‘,‘v‘) IS NOT NULL
DROP VIEW dbo.EmpOrders;
go
if object_id(‘dbo.orders‘,‘U‘) IS NOT null
DROP TABLE dbo.Orders
go
if oBJECT_ID(‘dbo.customers‘, ‘U‘) IS NOT NULL
DROP TABLE dbo.Customers
GO
if object_id(‘dbo.Employees‘,‘U‘) IS NOT NULL
DROP TABLE dbo.Employees;
GO
if object_id(‘dbo.shippers‘,‘U‘) Is NOT NULL
DROP TABLE dbo.Shippers ;
--教据分布设置
DECLARE
@numorders as Int,
@numcusts as Int,
@numemps as Int,
@numshippers As INT,
@numyears as int,
@startdate as datetime;
SELECT
@numorders=1000000
,@numcusts=20000
,@numemps=500
,@numshippers=5
,@numyears=4
,@startdate=‘20050101‘;
--创建和镇克Customers表
CREATE TABLE dbo.Customers(
custid CHAR(11) NOT NULL,
custname NVARCHAR(50) NOT NULL
);
INSERT INTO dbo.Customers(custid, custname)
SELECT
(‘C‘+ right(‘000000000‘ + CAST(n AS VARCHAR(10)), 10)) AS custid,
(N‘Cust_‘ + CAST(n AS VARCHAR(10))) AS custname
FROM dbo.Nums
where n<=@numcusts;

ALTER TABLE dbo.Customers ADD
CONSTRAINT Pk_Customers primary key(custid);

--创建和镇充Employees来
CREATE TABLE dbo.Employees
(empid 
INT NOT NULL primary key,
firstname NVARCHAR(25) not NULL,
lastname NVARCHAR(25) NOT NULL);
INSERT INTO dbo.Employees(empid, firstname, lastname)
select n as empid ,N‘Fname_‘+cast(n as nvarchar(10)) as  firstname,
N‘Lname_‘+cast(n as nvarchar(10)) as  lastname from dbo.Nums where n<=@numemps;

create table dbo.Shippers(
    shipperid varchar(5) not null,
    shippername nvarchar(50) not null
);

insert into dbo.Shippers(shipperid,shippername)
select shipperid,N‘Shipper_‘+shipperid as shippername from (select char(ascii(‘A‘)-2+2*n) as shipperid from dbo.Nums where n<=@numshippers) as d;

alter table dbo.Shippers add constraint PK_Shippers primary key(shipperid);

create table dbo.Orders(
orderid int not null,
custid char(11) not null,
empid int not null,
shipperid varchar(5) not null,
orderdate datetime not null,
filler char(155) not null default(‘a‘)
);
insert into dbo.Orders(orderid,custid,empid,shipperid,orderdate)
    select n as orderid,‘C‘+right(‘000000000‘+cast(1+abs(CHECKSUM(NewId()))%@numcusts as varchar(10)),10)as  custid,
    1+abs(CHECKSUM(NewId())) % @numemps as empid,
    char(ASCII(‘A‘)-2 +2*(1+abs(CHECKSUM(NewId()))%@numshippers)) as shipperid,
     dateadd(day,n/(@numorders/(@numyears*365.25)),@startdate)
     -- late arrival with earlier date 
     -case when n%10=0
     then 1+abs(CHECKSUM(NewId()))%30
     else 0
     end as orderdate
     from dbo.Nums where n<=@numorders order by CHECKSUM(NEWID());

create clustered index idx_cl_od on dbo.orders(orderdate);
create nonclustered index idx_nc_sid_od_i_cid on dbo.Orders(shipperid,orderdate) include(custid);

create unique index idx_unc_od_oid_i_cid_eid on dbo.Orders(orderdate,orderid) include(custid,empid);
alter table dbo.Orders add
    constraint PK_Orders primary key nonclustered(orderid),
    constraint FK_Orders_Customers foreign Key(custid) references dbo.Customers(custid),
    constraint FK_Orders_Employess foreign Key(empid) references dbo.Employees(empid),
        constraint FK_Orders_Shippers foreign Key(shipperid) references dbo.Shippers(shipperid);
    go