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Database Redesign

Database Redesign
Which SQL-92 standard SQL command can be used to change a table name?

None of these
ALTER TABLE
RENAME TABLE
CHANGE TABLE

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Database Redesign
The SQL-92 command to change a table name is RENAME TABLE.

False
True

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Database Redesign
The NOT EXISTS keyword will be true if:

both of these two conditions are met.
neither of these two conditions is met.
any row in the subquery meets the condition.
all rows in the subquery fail the condition.

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Database Redesign
The EXISTS keyword will be true if any row in the subquery meets the condition.

False
True

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

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

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

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

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