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FJHJH 7&#%'#!%!)#T!"%'%8%9#! 2'!/9!];/'#!9/($-#!'*!.&#%'#!%!)#T!6%'%8%9#!/)!P/.&*9*+'!:<=!:#&Q#&J!a;9'!&/04'A /.g!*)!'4#! l"%'%8%9#9m!)*6#!%)6!9#-#.'!l@#T!"%'%8%9#hm! ! ! 34#&#!%&#!-*'9!*+!9#''/)09!5*;!(%5!9#'!�%&6/)0!5*;&!6%'%8%9#1!8;'!'4#!*)-5!/)+*&(%'/*)!5*;! (;9'!+/ !/)!/9!'4#!)%(#!*+!5*;&!6%'%8%9#^! ! [...]... SQL language to create a new database, but sometimes it is easier to just use the built-‐in features in the Management Studio 2.1.2 Queries In order to make a new SQL query, select the “New Query button from the Toolbar Here we can write any kind of queries that is supported by the SQL language Tutorial: Structured Query Language. .. and Sybase Tutorial: Structured Query Language (SQL) 15 CREATE TABLE Below we see the same tables inside the design tool in SQL Server Tutorial: Structured Query Language (SQL) 16 CREATE TABLE 3.2 Create T ables u sing t he D esigner T ools Even if you can do “everything” using the SQL language, it is sometimes easier... and select “Relationships…”: Tutorial: Structured Query Language (SQL) 20 CREATE TABLE The following window pops up (Foreign Key Relationships): Click on the “Add” button and then click on the small “…” button Then the following window pops up (Tables and Columns): Tutorial: Structured Query Language (SQL) 21 CREATE TABLE ... constraints and select “Check Constraints…”: Tutorial: Structured Query Language (SQL) 25 CREATE TABLE Then click “Add” and then click “…” in order to open the Expression window: In the Expression window you can type in the expression you want to use: Tutorial: Structured Query Language (SQL) 26 CREATE TABLE 3.3.6 DEFAULT ... and OBJECTPROPERTY(id, N'IsUserTable') = 1 and name = 'CustomerNumber') ALTER TABLE CUSTOMER ALTER COLUMN CustomerNumber int Tutorial: Structured Query Language (SQL) 29 Else ALTER TABLE CUSTOMER ADD CustomerNumber int GO Tutorial: Structured Query Language (SQL) CREATE TABLE 4 INSERT INTO The INSERT INTO statement is used to insert a new row in a table ... FOREIGN K EY A FOREIGN KEY in one table points to a PRIMARY KEY in another table Example: We will create a CREATE TABLE script for these tables: Tutorial: Structured Query Language (SQL) 19 CREATE TABLE SCHOOL: CREATE TABLE SCHOOL ( SchoolId int IDENTITY(1,1) PRIMARY KEY, SchoolName varchar(50) NOT NULL UNIQUE, Description varchar(1000) NULL, Address... students) Columns: Use Pascal notation, e.g., “StudentId” Primary Key: o If the table name is “COURSE”, name the Primary Key column “CourseId”, etc Tutorial: Structured Query Language (SQL) 14 • • • • CREATE TABLE o “Always” use Integer and Identity(1,1) for Primary Keys Use UNIQUE constraint for other columns that needs to be unique,... PRIMARY KEY, CustomerNumber int NOT NULL UNIQUE, LastName varchar(50) NOT NULL, FirstName varchar(50) NOT NULL, AreaCode int NULL, Address varchar(50) NULL, Phone varchar(50) NULL, ) GO Tutorial: Structured Query Language (SQL) 22 CREATE TABLE We see that “CustomerNumber”, “LastName” and “FirstName” is set to “NOT NULL”, this means these columns needs to contain data ... CREATE TABLE [CUSTOMER] ( CustomerId int IDENTITY(1,1) PRIMARY KEY, CustomerNumber int NOT NULL UNIQUE, LastName varchar(50) NOT NULL, FirstName varchar(50) NOT NULL, AreaCode int NULL, Tutorial: Structured Query Language (SQL) 23 CREATE TABLE Address varchar(50) NULL, Phone varchar(50) NULL, ) GO We see that the “CustomerNumber” is set to UNIQUE, meaning each customer must have... right-‐click on the column that you want to be UNIQUE and select “Indexes/Keys…”: Then click “Add” and then set the “Is Unique” property to “Yes”: Tutorial: Structured Query Language (SQL) 24 CREATE TABLE 3.3.5 CHECK The CHECK constraint is used to limit the value range that can be placed in a column If you define a CHECK
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