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What are the General Transformation Rules for Relational operations?
Ans: The transformation rules transform one relational algebra expression to AN
EQUIVALENT ONE
1. Employed by the query optimizer to optimize query tree
2. Any type of rule, if applied, ensures that the resultant tree is equivalent → resulting execution plan is equivalent
General Transformation Rules is as follow:
1. Commutativity of s: The s operation is commutative:
What do you understand by ACID? - ACID (Atomicity Consistency Isolation Durability) is a quality sought after in a reliable database. Here's the relevance of each quality:
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Database systems have many opposite efforts ?
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Storage Of Database On Hard Disks At this point, it is worthwhile to note the difference among the terms file Organisation and the access method. A file organisation shows to t
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