
<h3>9.13.17</h3>
REM == */ or // (.bat only)

data definition language .ddl

Drop ~= Delete

Delete specifies who
Drop deletes all (including ___ table)

Opposite of drop is create

--Cancatanated Primary key  

contents of this .bat file will be used with client software 
(SQL Server management studio)

-i in a sql cmmand (which follows this will be the input file)

in a sql cmd, a i- is a parameter followed by name of file
the file better exist

(dash and letter = parameter)

-S (server) ((Capitalized))

-d (database) ((Lowercase))

pause in .sql file gives time to see error message


Data modules Industry based
Hierarchal (database model)
Network (database model)
Relational (database model)
ERD (data model)

They're database models and not data models