Why not phenix, the zelinka/otwinoski libraries, etc?

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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 is the purpose of using a model?

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Define entity.

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What is TERM ?

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Which is fastest database?

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What are different types of transaction isolation levels?

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Why do we need database management?

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Briefly describe the three types of sql commands.

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What is 1nf in database?

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How do queries work in a database?

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If an UNIQUE KEY constraint on DATE column is created, will it accept duplicate values?

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