Explain why it is important to learn SQL
What will be an ideal response?
Most modern DBMS products support SQL as a standardized data language. These products usually provide graphical tools to perform the tasks associated with SQL, but there are some tasks that cannot be performed using these graphical tools. SQL is text-oriented, and SQL code must be written in order to embed SQL commands within program applications.
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The null hypothesis for Pearson's correlation coefficient states there is an association between the two variables in the population and that the correlation coefficient is one.
a. true b. false
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A return value is always a ________ item
A) simple B) plural C) single D) parallel
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