Ecco un esempio di normalizzazione delle tabelle in uno script. Ti consiglio di fare qualcosa del genere
e.g Table: tbl_tmpData
Date, ProductName, ProductCode, ProductType, MarketDescription, Units, Value
2010-01-01, 'Arnotts Biscuits', '01', 'Biscuit', 'Store 1', 20, 20.00
2010-01-02, 'Arnotts Biscuits', '01', 'Biscuit', 'Store 2', 40, 40.00
2010-01-03, 'Arnotts Biscuits', '01', 'Biscuit', 'Store 3', 40, 40.00
2010-01-01, 'Cola', '02', 'Drink', 'Store 1', 40, 80.00
2010-01-02, 'Cola', '02', 'Drink', 'Store 2', 20, 40.00
2010-01-03, 'Cola', '02', 'Drink', 'Store 2', 60, 120.00
2010-01-01, 'Simiri Gum', '03', 'Gum', 'Store 1', 40, 80.00
2010-01-02, 'Simiri Gum', '03', 'Gum', 'Store 2', 20, 40.00
2010-01-03, 'Simiri Gum', '03', 'Gum', 'Store 3', 60, 120.00
Dovresti prima creare la tua tabella delle date:
CREATE TABLE tbl_Date
(
DateID int PRIMARY KEY IDENTITY(1,1)
,DateValue datetime
)
INSERT INTO tbl_Date (DateValue)
SELECT DISTINCT Date
FROM tbl_Data
WHERE Date NOT IN (SELECT DISTINCT DateValue FROM tbl_Date)
quindi creeresti la tua tabella di mercato
CREATE TABLE tbl_Market
(
MarketID int PRIMARY KEY IDENTITY(1,1)
,MarketName varchar(200)
)
INSERT INTO tbl_Market (MarketName)
SELECT DISTINCT MarketDescription
FROM tbl_tmpData
WHERE MarketName NOT IN (SELECT DISTINCT MarketDescription FROM tbl_Market)
dovresti quindi creare la tua tabella ProductType
CREATE TABLE tbl_ProductType
(
ProductTypeID int PRIMARY KEY IDENTITY(1,1)
,ProductType varchar(200)
)
INSERT INTO tbl_ProductType (ProductType)
SELECT DISTINCT ProductType
FROM tbl_tmpData
WHERE ProductType NOT IN (SELECT DISTINCT ProductType FROM tbl_ProductType)
quindi creeresti la tua tabella dei prodotti
CREATE TABLE tbl_Product
(
ProductID int PRIMARY KEY IDENTITY(1,1)
, ProductCode varchar(100)
, ProductDescription varchar(300)
,ProductType int
)
INSERT INTO tbl_Product (ProductCode, ProductDescription, ProductType)
SELECT DISTINCT tmp.ProductCode,tmp.ProductName, pt.ProductType
FROM tbl_tmpData tmp
INNER JOIN tbl_ProductType pt ON tmp.ProductType = pt.ProductType
WHERE ProductCode NOT IN (SELECT DISTINCT ProductCode FROM tbl_Product)
dovresti quindi creare la tua tabella dati
CREATE TABLE tbl_Data
(
DataID int PRIMARY KEY IDENTITY(1,1)
, DateID varchar(100)
, ProductID varchar(100)
, MarketID varchar(300)
,Units decimal(10,5)
, value decimal(10,5)
)
INSERT INTO tbl_Data (ProductID, MarketID, Units, Value)
SELECT t.DateID
, p.ProductID
, m.MarketID
, SUM(tmp.Units)
, SUM(tmp.VALUE)
FROM tbl_tmpData tmp
INNER JOIN tbl_Date t ON tmp.Date = t.DateValue
INNER JOIN tbl_Product p ON tmp.ProductCode = p.ProductCode
INNER JOIN tbl_Market m ON tmp.MarketDescription = m.MarketName
GROUP BY t.DateID, p.ProductID, m.MarketID
ORDER BY t.DateID, p.ProductID, m.MarketID
