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

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

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Introduction to SQL
NULL is

the same as blank for character
the same as 0 for integer
the same as 0 for integer and blank for character
not a value

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