Introduction to SQL
The SQL WHERE clause:

limits the row data are returned.
limits the column data that are returned.
Neither A nor B are correct.
Both A and B are correct.

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Introduction to SQL
In an SQL SELECT statement querying a single table, according to the SQL-92 standard the asterisk (*) means that:

all records meeting the full criteria are to be returned.
all columns of the table are to be returned.
None of these
all records with even partial criteria met are to be returned.

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