5

5 Normalization () Customer IDCustomerNameCustomer Address

9118/18 .- .18

92100/6 . 2 .

94 () G The Mall - 275 1 . .

95 1770 . .

() ( ) SQL Server 2,000 1 Primary Key Foreign Keys , Data Integrity SQL Management Studio

SQL Server Management Studio Transact SQL 1. 2. Tables New Table

3. Table Design , ,

5.1 3 TblProducts 1. 2. Tables New Table.

3. Table Design , , (Field Name)(Date Type)(Description)

ProductIDInt

CategoryIDInt

ProductNameNchar(50)

UniPriceMoney()

VATFlagBit

ProductID

4. TbIProducts Table Design TbIProducts

Note Primary Key Primary Key Comstraints

5.2

TbICategories 1. 2. Tables New Table

3. Table Design , , (Field Name)(Date Type)(Description)

CategoryIDInt

CategoryNamenvarchar(50)

CategoryDescriptionNtext

CategoryPictureImage

CategoryID 4. TbICtegories Table Design TbICategories

CREATE TABLE

Transact SQL CREATE TABLE CREATE TABLE , Constraints CREATE TABLE CREATE TABLE [database.]ormer.]table_name

(,column_name datatype[not null]IDENTITY[(seed,increment) ][constraint][,column_name datatype [not null | null IDENTITY[(seed,increment)]]][constraint]..)[ON file group]

NULL

CREATE TABLE NULL NOT NULL NOT NULL

NULL NULL ASCll NULL

NULL (null) 2 NULL

NULL NULL NULL quote () (NULL) NULL

CREATE TABLE TblProducts ProductID, CategoryID, ProductName, UnitPrice, VATFlag, UnitinStock ProductID Primary Key

Tip

USE database_name

database_name ldentity

identity (Seed) (increment) identity

identity col1 =1 =1 1,2,3,4,5,.. identity Column Properties SQL Server Management Studio CREATE TABLE identity

BIGINT,INT, SMALLINT, TANYINT, DECIMAL NOT NULL Tip

identityCol identity

SELECT identity Col FROM TblProductsNote

sa sysadmin fixed server role () 128

SQL Server , , 1 1,024 Tip

sp_spaceused USE Orders

sp_spaceused TvlProducts

TblProducts Orders

TINYINT 0-255 1

SMALLINT -32,768 32,767 2

INT INTEGER, (2^31) (2^31) -1 -2,147,483,647 4

BIGINT (2^63) (2^63)-1 8

SQL Server 100000 Smallint 32,767 SQL Server

SQL Server 2

Approximate Numeric Data Types

Float Real

FLOAT[(n)] 1.7 E -308 1.7 E+308 8 n 15 n 1 53 n 1-24 7 4 25-53 15 8

REAL -3.4 E 3.4E+38 4 7 FLOAT (24)

Exact Numeric Data Types DECIMAL NUMERIC

DECIMAL[(p[,s])], NUMERIC[(p[,s])] DECIMAL NUMERIC p s -10^38+1 10^38-1 5 17 , P (precision) p 18 p 1 38 (1