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QThe constraint that can be applied only at column level is

ID: #2785 Relational Model in DBMS 1,597 views
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#2785Q ID
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Relational Model in DBMSTopic
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  • A Primary key constraint ✔ ✖
  • B Foreign key constraint ✔ ✖
  • C Unique constraint ✔ ✖
  • D Not Null constraint ✔ ✖
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Explanation

Not Null constraint
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