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How to create a table from existing table?
Create table as
e.g, To create a new table ‘N_emp' with employee names and their identification numbers only from employee table, statement is to create table N_emp as select empname, empid from employee
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
An example of a weak entity is Staff because the availabilityID cannot be uniquely identified unless it is used in conjunction with the foreign key known as availabilityID in the A
Question (a) Visual Basic is governed by an event processor. Explain the meaning of this phrase. (b) Differentiate between an general procedure and event procedure. (c)
Normal 0 false false false EN-IN X-NONE X-NONE
Why older data models are being replaced by new data modelling 100 words accepted#
Consider the relation schemas as follows. works (person name, company name, salary); lives (person name, street, city); located in(company name, city); managers (person name
Question: In a multi-user database environment, locking mechanisms can be used to solve the three basic problems of concurrency. On the other hand, however, locking may also le
A field-groups statement or an insert statement reverses storage space and transfers values. False.
why are older data models are being replaced by new data models
What are the disadvantages of file processing system? The drawbacks of file processing systems are a) Data redundancy and inconsistency b) Complexity in accessing data
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