Each database is different in how their search engine functions, what and how material is covered, and how results are displayed. Although the search interface varies among the databases, there are a limited number of variants and each has it's own pecularities. This section will give you a quick run down of the different types of interfaces and which databases use them.
The single search box is becoming the most common type of search box and you'll find it both in web-based search engines as well as library research databases. Databases such as Google and it's subsets, and Library One Search, use the single search box.
Many single search box engines (such as Google and Library One Search) will also provide an "advanced" search screen giving you search boxes for the specific sections (aka "fields") within a record.
The "three row/concept" is the easiest search form to work with when you know not only your concept terms but also their synonyms. This type of interface is an "advanced" search interface most commonly found in traditional library research databases such as ABI/Inform, Compendex, Inspec, and Web of Science.
SciFinder is unique among the literature databases as its search box requires natural language rather than a keyword list or boolean commands.