Q. The union operation is represented by

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Q. The intersection operator is used to get the _____ tuples.

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Q. The union operation automatically __________, unlike the select clause.

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Q. If we want to retain all duplicates, we must write ________ in place of union.

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Q. For like predicate which of the following is true.

i) % matches zero OF more characters.
ii) _ matches exactly one CHARACTER.

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Q. The number of attributes in relation is called as its

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Q. _____ clause is an additional filter that is applied to the result.

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Q. _________ joins are SQL server default

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Q. The _____________ is essentially used to search for patterns in target string.

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Q. A _____ indicates an absent value that may exist but be unknown or that may not exist at all.

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Q. If the attribute phone number is included in the relation all the values need not be entered into the phone number column . This type of entry is given as

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Q. The predicate in a where clause can involve Boolean operations such as and.The result of true and unknown is_______ false and unknown is _____ while unknown and unknown is _____

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Q. In a employee table to include the attributes whose value always have some value which of the following constraint must be used ?

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Q. Using the ______ clause retains only one copy of such identical tuples.

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Q. You attempt to query the database with this command:

SELECT nvl (100 / quantity, NONE)
FROM inventory;

Why does this statement cause an error when QUANTITY values are null?

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Q. The result of _____unknown is unknown.

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Q. Aggregate functions are functions that take a ___________ as input and return a single value.

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Q. A Boolean data type that can take values true, false, and________

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Q. Which of the following should be used to find all the courses taught in the Fall 2009 semester but not in the Spring 2010 semester .

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Q. The phrase “greater than at least one” is represented in SQL by _____

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