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1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
What are the ways in which the variable-length records arise in database systems? Storage of many record types in a file. Record types that permit variable lengths for one o
Express types of information available in MySQL? Information as regards the result of queries: This includes number of records affected by any SELECT or UPDATE or DELETE st
Query Processor The query language processor is responsible for taking query language statements or shifting them from the English-like syntax of the query language to a form
What are called index-sequential files? The files that are ordered sequentially with a primary index on the search key are known as index-sequential files
The Maximum no of key fields that can be used in a header is?? 50
Define the Query optimisation The query parser commonly generates a standard initial tree to correspond to an SQL query, with no doing any optimization. Such type of a canonica
What is an Operand? The data on which the operation is to be performed is known as an Operand
How to draw an ER diagram to a finance companz
describe all the tables you have created. ?get table_name, status, num_rows, user_stats in user_tables system view ?get table_name, constraint_name, constraint_type in user_constr
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