Respuesta :
The correct answer is a. true the select statement uses the attribute list to indicate what columns to project in the result set.
Within an INSERT statement, insert a SELECT command. If you haven't used the COMMIT command, you can use the ROLLBACK command to recover a table's data. By specifying the required fields and putting constraints on the rows to be included in the output, you may choose only a portion of the contents of the table. Transmute() adds new variables while dropping old ones; mutate() adds new variables while keeping old ones. New variables replace any identically named ones that already exist. Columns in an existing table can be added, removed, or modified using the ALTER TABLE command. A table's current constraints can be added or removed using the ALTER TABLE command.
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