____ is a single item of information about a person, place, or thing—such as a name, a salary amount, a Social Security number, or a price.   a. table     b. record     c. dataset     d. field

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A: The answer is as follows:-

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A: Insert – is used to insert data into a table. It is a Data Manipulation Command(DML)

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A: According to the asked question, the solution is given below with a proper explanation.

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A: Program: #function for adding record def addRecord():       #input name     name = input("\nEnter…

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A: I Have answered this question in step 2.

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A:

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A: Give the data, Need to Calculate and fill the column using data validation.

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A: IN THE QUESTION THEY ASK TO GET DATA FROM THE INTERNET AND STORE IN EXCEL FILE GENERALLY WE USE…

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A: Required:   Subschema can be used to a. create very different, personalized views of the same…

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A: a.) date created - the date on which data is created is a part of the usage information as we can…

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A:

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A:

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A: The above question is solved in step 2:-

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Concurrency Control

The simultaneous occurrence of two or more operations is called concurrence and the situation is called concurrency. In concurrency, the function of one operation can affect the function of the other and put data integrity at risk. Hence, management for the control of concurrency is required. The management or controlling system in the Database Management System (DBMS) that coordinates concurrent access is called the concurrency control system.