i have been given 8 differebt data warehouseing
I have been given 8 differebt data warehouseing failure case studies. I need to question 4 questions for each
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check constraints in sqla check constraint is a table constraint defined using the key word check as already illustrated in several examples in this
example of shorthand for a row constraintexample shorthand for a row constraintalter table exammarkadd constraint markinrangecheck mark between 0 and
primary key - sqla primary key specification carries an implicit not null constraint on each column of the specified key when more than one key
can anyone solve this assigment dlsqrt3x-5 sqrt2xl 3 l -1 1
i have been given 8 differebt data warehouseing failure case studies i need to question 4 questions for
keys in sqlsql support for keys in the following respectssql does not require at least one key for every base table if no key is explicitly declared
effects of null for unique specificationwhen a unique specification u for base table t includes a column c that is not subject to a not null
when or then key constraintssuppose a table has two columns representing a period of time throughout which the information conveyed by the other
example of when or then constraintsa concrete example showing how sql supports whenthen constraintscreate table salhistory empno char 6salary integer
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