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According to Codd's rule of relational database,"Application programs and ad hoc facilities are logically unaffected when changes are made to the table structures that preserve the original table values (changing order of columns or inserting columns) ."
Selenium
a chemical element with symbol Se and atomic number 34, known for its role in antioxidant enzymes and its toxicity in large amounts.
Atomic Symbol
A notation of one or two letters representing a chemical element (e.g., O for oxygen, Ag for silver).
Tungsten
A chemical element known for having the highest melting point of all the non-alloyed metals, making it excellent for use in high-temperature applications.
Atomic Symbol
A one or two-letter notation representing a chemical element (e.g., O for oxygen, H for hydrogen).
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