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what is key's in DBMS?
Keys why use
2 Answers
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In sql , key refers to a column or a field
for RDBMS , most important thing is to have a primary key field bcz it prevents duplicate values & not allows null value
//when more than 1 fields/keys/columns works together to uniquely identify each record then they together known as "composite key"
//hope it helps âș
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keys