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hi if i have table employee with employee_id as a primary key [b]how can i assign the primary key to the columns firstname and lastname?[/b] table structure is something like this : employee_id int not null, firstname varchar(20) not null, lastname varchar(20) not null the problem is that there is … |
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hey cna you please explain to me the following <" Because the database also stores all the data of the database itself, each database has a number of system tables. Each new database is created following the Model database model. The Master database keeps track of information about the other … |