March 2001
Intermediate to advanced
640 pages
14h 9m
English
book
Sams Teach Yourself Transact-SQL in 21 Days, Second Edition
by Lowell Mauer, David Solomon, Bennett McEwan
Content preview from Sams Teach Yourself Transact-SQL in 21 Days, Second Edition
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Understanding More About Joins
Now that you have written a join, let's take a moment to understand how joins work.
Listing 5.1 shows the code to create and populate two small tables in an automobile database. The first table is a list of car Makes; that is, manufacturers of automobiles. The second table is a list of Models. Each model corresponds to an entry in the Makes table.
Code Listing 5.1. Create and Populate Small Makes and Models Tables to Practice Joining Tables
1: create table Makes ( 2: MakeID int identity primary key, 3: MakeDescription nvarchar(10) not null 4: ) 5: go 6: create table Models ( 7: ModelID int identity (101,1) primary key, 8: MakeID int not null references Makes (MakeID), 9: ModelName nvarchar(20) not null 10: ) 11: ... |
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