Examlex
To study past climates, scientists use direct measurements.
Redundancy
The inclusion of extra components or systems that are not strictly necessary, to provide backup in case of failure.
Primary Key
A unique identifier for each record in a database table, ensuring no two rows have the same key.
Employee Table
A structured arrangement of data often in rows and columns that pertains to employees.
Social Security Number
A nine-digit number issued to U.S. citizens, permanent residents, and temporary working residents that tracks individuals for Social Security and tax purposes.
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