SQL extension for exploring multiple tables
Sung Jin Kim, Junghoo John Cho · 2008
The standard SQL assumes that the users are aware of all tables and their schemas to write queries. This assumption may be valid when the users deal with a relatively small number of tables, but writing a SQL query on a large number of tables is often challenging; (1) the users do not know what tables are relevant to their query, (2) it is too cumbersome to explicitly list tens of (or even hundreds of) relevant tables in the FROM clause and (3)