Keyword Search in Relational Databases: A Survey.
Jeffrey Xu Yu, Lu Qin, Lijun Chang · 2010
The integration of DB and IR provides flexible ways for users to query information in the same platform [6, 2, 3, 7, 5, 28]. On one hand, the sophisticated DB facilities provided by RDBMSs assist users to query well-structured information using SQL. On the other hand, IR techniques allow users to search unstructured information using keywords based on scoring and ranking, and do not need users to understand any database schemas.