The following statement specifies which type of constraint.
PNO IN ASG REFERENCES PNO IN PROJ.
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Explanation:An important requirement of a centralized or a distributed DBMS is the ability to support semantic data control, i.e., data and access control using high-level semantics. Semantic data control typically includes view management, security control, and semantic integrity control. Informally, these functions must ensure that authorized users perform correct operations on the database, contributing to the maintenance of database integrity
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