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Define object-relational systems?
Systems that give object-oriented extensions to relational systems are known as object-relational systems.
What is the use of unique function? UNIQUE function: If UNIQUE is specified then only unique values are used to computed the mean.
UNION If R1 and R2 are two union compatible relations then R3 = R1 ∪ R2 is the relation having tuples that are either in R1 or in R2 or in both. In case, R3 will have tuples
Define the phases of two phase locking protocol Growing phase: a transaction may get locks but not release any lock. Shrinking phase: a transaction might be release locks bu
What is NULL? Simply NULL means not in value.
write short note on mobile database
In tuple relational calculus P1 → P2 is equivalent to ? A In tuple relational calculus P1→ P2 is equivalent to ¬P1 V P2. (The logical implication expression A B, meaning
#quesDefine a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pi
List and also explain the dissimilar stages of DDLC ?
Do you have experts of the dbms
What are the uses of the information in the Data dictionary? The following information is directly taken from the Data dictionary: Information on fields displayed with
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