A regular subquery is processed from the bottom up.
Correlated subqueries are similar to a regular subquery.
Which SQL-92 standard SQL command can be used to change a table name?
The NOT EXISTS keyword will be true if any row in the subquery meets the condition.
Because of the need for extensive knowledge of SQL, many database developers choose to automate the redesign process.
The data model produced from the reverse engineering process is a true logical model.
It is not easy to build a database correctly the first time.
Database redesign is especially difficult if the database has no data.
Some organizations take the stand that no application should ever employ the true name of a table.
The process of reading a database schema and producing a data model from that schema is known as:
Dependency graphs are diagrams that consist of nodes and arcs that show the dependencies of a database.
The EXISTS keyword will be true if any row in the subquery meets the condition.
The data model produced from the reverse engineering process does not include intersection table data.
If a database is built correctly the first time, it will not have to be redesigned.
Typically, there should be at least two different copies of the database schema used in the redesign process.
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