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Database Design Using Normalization
Each answer below shows example data from a table. Which answer is an example of the multivalue, multicolumn problem?
Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.
Three rows have the values Brown, NULL, and Blue in the same column.
One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.
Correct Answer:
Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.
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Database Design Using Normalization
For a number of reasons, normalizations is not often an advantage for a(n) ________ database.
Using the SQL GROUP BY phrase with a SELECT statement can help detect which of the following problems?
Most of the time, modification anomalies are serious enough that tables should be normalized into:
If a table has been normalized so that all determinants are candidate keys, then that table is in:
When assessing the table structure of an acquired set of tables with data, counting the number of table rows is (part of) the:
Each answer below shows example data from a table. Which answer is an example of the missing values problem?
In all cases, normalization into BCNF is desirable.
Denormalized tables are in BCNF.
Normalization requires programmers to write more complex SQL.
When building a database from an existing set of tables, we may safely assume that referential integrity constraints have been enforced on the data we are given.
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