Introduction to SQL
............. joins two or more tables based on a specified column value not equaling a specified column value in another table.

EQUIJOIN
NON-EQUIJOIN
OUTER JOIN
NATURAL JOIN

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Introduction to SQL
The HAVING clause does which of the following?

Acts like a WHERE clause but is used for rows rather than columns.
Acts EXACTLY like a WHERE clause.
Acts like a WHERE clause but is used for groups rather than rows.
Acts like a WHERE clause but is used for columns rather than groups.

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