A primary key is the column or columns that contain values that uniquely identify each row in a table. ... A primary key is needed: In any table that is visited more than once in a process, for example, a child table that has two or more parent tables referenced in the Access Definition.
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A primary key is the column or columns that contain values that uniquely identify each row in a table. ... A primary key is needed: In any table that is visited more than once in a process, for example, a child table that has two or more parent tables referenced in the Access Definition.
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A primary key is the column or columns that contains values that uniquely identify each row in a table.
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