This section contains the create
, insert
and T-SQL code to run the examples from Chapter 5, “Clustering Data: The Second Power of Indexing” in a SQL Server database. It requires the helper functions RANDOM_DATE
and RANDOM_INT
from the where clause examples.
Index-Organized Table (Clustered Index)
The following creates a second sales table with a clustered index and a secondary index on SALE_DATE
.
CREATE TABLE sales_clst (
sale_id NUMERIC NOT NULL,
employee_id NUMERIC NOT NULL,
subsidiary_id NUMERIC NOT NULL,
sale_date DATE NOT NULL,
eur_value NUMERIC(17,2) NOT NULL,
junk CHAR(200),
CONSTRAINT sales_pk
PRIMARY KEY (sale_id),
CONSTRAINT sales_emp_fk
FOREIGN KEY (subsidiary_id, employee_id)
REFERENCES employees(subsidiary_id, employee_id)
);
GO
SELECT RAND(0);
GO
WITH generator (n)
AS (
SELECT 1
UNION ALL
SELECT n + 1
FROM generator
WHERE N < 1800
)
INSERT INTO sales_clst (sale_id
, subsidiary_id, employee_id
, sale_date, eur_value, junk)
SELECT row_number() OVER (ORDER BY sale_date), data.*
FROM (
SELECT e.subsidiary_id, e.employee_id
, [dbo].random_date(0, 3650) sale_date
, [dbo].random_int(1, 100000)/100 eur_value
, 'junk' junk
FROM employees e
, generator gen
WHERE employee_id % 7 = 4
AND gen.n < employee_id / 5
) data
ORDER BY sale_date
OPTION(MAXRECURSION 2000);
GO
EXEC sp_updatestats;
GO