Which of these outputs can be found by querying a database? the weather for a day next month the number of students with the last name smith a graph of the number of students who play each sport a list of all the different ways that a student’s name might be spelled

A query uses the "SELECT" statement to extract data from the database. In the example above, if you have a students’ table, you might want to issue an SQL statement that returns the number of students with the last name Smith. This request to the database can be performed in a relational database.

building and maintaining the topology is difficult and time consuming. the chance of redundant connections is high, which adds to the high costs and potential for reduced efficiency.

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