Question

A table can have multiple primary keys in a database​

Answer 1

Climate refers to the sum total of weather conditions and variations over a large area for a long period of time (more than thirty years). ... The elements of weather and climate are the same, i.e. temperature, atmospheric pressure, wind, humidity and precipitation.

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Answer 2

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A table can have only one primary key, which may consist of single or multiple fields. When multiple fields are used as a primary key, they are called a composite key. If a table has a primary key defined on any field(s), then you cannot have two records having the same value of that field(s).