What are the features of a database management system?

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What are the main differences between primary key and unique key?

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1.If we have a Salary coloumn in Staff entity with this description the salary must be monetary and >=$35450.00, how we can write it in into schemain SQL? 2. If we have Weight and Marks in Assessment entity and the Weight has the description of this it must be Non-zero percentage. And also the Marks attribute stores the maximum possible raw mark for assessment (e.g., 30), while Weight stores of the weight of this assessment for the paper as a whole (e.g., 10%). If Marks is not specified, then Weight is used for both. How we can convert this into schema in SQL????

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What are the main features of a database?

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how to retrive a data From database into the grid view..?

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How to Handle Missing Data in a Database?

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Can two oracle blocks have the same address?

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What is the use of INDEXES option in EXP command ?

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What do you understand by index hunting?

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What is cold backup (in case of oracle)?

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What are the five important software components of a database management system?

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Is it possible to use Transactional control statements in Database ?

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