What SQL command will allow you to change the table STUDENT to add the constraint named GradeCheck that states that the values of the Grade column must be greater than 0?

Database Redesign
What SQL command will allow you to change the table STUDENT to add the constraint named GradeCheck that states that the values of the Grade column must be greater than 0?

ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck (Grade > 0);

ALTER TABLE STUDENT ALTER CONSTRAINT GradeCheck (Grade > 0);

ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck CHECK (Grade > 0);

None of these

ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck (Grade > 0);

ALTER TABLE STUDENT ALTER CONSTRAINT GradeCheck (Grade > 0);

ALTER TABLE STUDENT ADD CONSTRAINT GradeCheck CHECK (Grade > 0);

None of these

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Which is not true of a correlated subquery?

The processing of the SELECT statements is nested.

They are very similar to a regular subquery.

EXISTS/NOT EXISTS is a form of a correlated subquery.

They can be used to verify functional dependencies.

The processing of the SELECT statements is nested.

They are very similar to a regular subquery.

EXISTS/NOT EXISTS is a form of a correlated subquery.

They can be used to verify functional dependencies.

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Database Redesign
Although creating test databases is a critical and necessary job, there are few career opportunities in this area.

True

False

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Database Redesign
The EXISTS keyword will be true if:

neither of these two conditions is met.

all rows in the subquery fail the condition only.

both of these two conditions are met.

any row in the subquery meets the condition only.

neither of these two conditions is met.

all rows in the subquery fail the condition only.

both of these two conditions are met.

any row in the subquery meets the condition only.

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

ALTER TABLE TableName DROP ColumnName

MODIFY TABLE TableName DROP ColumnName

ALTER TABLE TableName DROP COLUMN ColumnName

MODIFY TABLE TableName DROP COLUMN ColumnName

ALTER TABLE TableName DROP ColumnName

MODIFY TABLE TableName DROP ColumnName

ALTER TABLE TableName DROP COLUMN ColumnName

MODIFY TABLE TableName DROP COLUMN ColumnName

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Database Redesign
It is not easy to build a database correctly the first time.

True

False

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Database Redesign

Database Redesign What SQL command will allow you to change the table STUDENT to add the constraint named GradeCheck that states that the values of the Grade column must be greater than 0?

Database Redesign Which is not true of a correlated subquery?

Database Redesign Although creating test databases is a critical and necessary job, there are few career opportunities in this area.

Database Redesign The EXISTS keyword will be true if:

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

Database Redesign It is not easy to build a database correctly the first time.

Database Redesign
What SQL command will allow you to change the table STUDENT to add the constraint named GradeCheck that states that the values of the Grade column must be greater than 0?

Database Redesign
Which is not true of a correlated subquery?

Database Redesign
Although creating test databases is a critical and necessary job, there are few career opportunities in this area.

Database Redesign
The EXISTS keyword will be true if:

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

Database Redesign
It is not easy to build a database correctly the first time.