Definition

  • pptx
  • 09.05.2020
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The primary key is
cannot have the same primary key values.
Primary key usually
one example of unique indices and
None of the two table entries
used to uniquely identify table entries.
abbreviated as PK (primary key)

A foreign key is a key,
match the Primary Key in another table.
used to join two tables.
reference key.
A foreign key is a column or
combination of columns whose values
Sometimes also called