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Fifth Normal Form (5NF)
These relations still have a difficulty. While defining the 4NF we mentioned that all the attributes depend upon each other. Whereas creating the two tables in the 4NF, although we have preserved the dependencies among Vendor Code and Item code in the first table and Vendor Code and Item code in the second table, we have lost the relationship among Item Code and Project No. If there were a primary key then this loss of dependency would not have happened..
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
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what are the topics in data management
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wh
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which component of DBMS can be embedded in a program? The data manipulation language (DML) is a component which is embedded in a program.
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