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Information about a bank is about customers and their account. Customer has a name, address that consists of house number, area and city, and one or more phone numbers. Account has number, kinds and balance. We required to record customers who own an account. Account could be held individually or jointly. An account cannot exist without a customer.
Arrive at an E-R diagram. Clearly denotes attributes, keys, the cardinality ratios and participation constraints.
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
What is the use of group by clause? Group by clause is used to apply aggregate functions to a set of tuples. The attributes given in the group by clause are used to
Australian Bureau of Statistics (ABS) provides retail data for different groups and different states as well as the aggregate numbers. Table 11 " Retail Turnover, State by Industry
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
What is B-Tree? A B-tree eliminates the redundant storage of search-key values .It permits search key values to appear only once.
What is SQL, and why is it important? SQL stands for Structured Query Language, and is the most significant data processing language in use today. It is not a complete programm
various techniques of hashing?
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
Automated system for appointment with sms and call confirmation with service providers and user has to be initiate automatically. After selecting time and date to use service, s
If the insertion violates one or more constraints, then two alternatives are available: Default option: - Insertion can be discarded and the reason of refusal can also be ex
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