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2 Cards in this Set

  • Front
  • Back
What is a primary key? a foreign key?
-Identify each row with a unique column or set of columns
-a sep. table that relates back to a column in the main table
What is 1NF? 2NF? 3NF?
-Eliminate duplicative columns(atomicity)
-Remove subsets of data that apply to multiple rows of a table and place them in separate rows (use of foreign keys)
-Remove columns that are not dependent upon the primary key(math)