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Database Redesign

Database Redesign
How can you find rows that do not match some specified condition?

NOT EXISTS
Double use of NOT EXISTS
None of these
EXISTS

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Database Redesign
What SQL command can be used to add columns to a table?

ALTER TABLE TableName ADD ColumnName
MODIFY TABLE TableName ADD ColumnName
ALTER TABLE TableName ADD COLUMN ColumnName
MODIFY TABLE TableName ADD COLUMN ColumnName

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Database Redesign
To drop a column that is used as a foreign key, first:

All of these
drop the table containing the foreign key.
drop the primary key.
drop the foreign key constraint.

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Database Redesign
What SQL command can be used to delete columns from a table?

MODIFY TABLE TableName DROP COLUMN ColumnName
ALTER TABLE TableName DROP COLUMN ColumnName
ALTER TABLE TableName DROP ColumnName
MODIFY TABLE TableName DROP ColumnName

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Database Redesign
A regular subquery can be processed:

by nesting.
from the bottom up.
None of these
from the top down.

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Database Redesign
The use of the double NOT EXISTS can be used to find rows that do not match some specified condition.

True
False

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