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primary key

Noun CEFR B2

Definitions

In the design of a database table, the primary key (abbreviated PK) is selected among the non-empty set of candidate keys. The PK is a column (or an irreducible group of columns) able to identify every row of the table.

Equivalents

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CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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See also

primary legislation primary life support system primary market primary memory primary metabolite primary myelofibrosis

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