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What does the cardinality ratio specify?
Mapping cardinalities or cardinality ratios state the number of entities to which another entity can be associated. Mapping cardinalities must be one of the following:
One to one
One to many
Many to one
Many to many
Explain the Exec statement in SQL Ans: Exec statement has the structure EXEC SQL END-EXEC Embeded SQl statements are of a form identical to non embedded SQL statem
note on hashing technique
what is object-identity
What is a guard condition? Explain it with a suitable example. The guard-condition is a Boolean expression written with respect to parameters of triggering event and attributes
When It is better to use files than a DBMS? It is better to use files than a DBMS when Multiple users wish to access the data.
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
What is multiple relationship ?
Define database management system? Database management system (DBMS) is a set of interrelated data and a combination of programs to access those data.
how to construct labelled precedence graph for view serialiability.please explain insteps with one solved examples
What is database Trigger? A database trigger is a PL/SQL block that can explained to automatically execute for insert, update, and delete statements against a table. The trigge
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