A database that maintains a set of separate, related files (tables), but combines data elements from the files for queries and reports when required. The concept was developed in 1970 by Edgar Codd, ...

A question asked about data contained in two or more tables in a relational database. The relational query must specify the tables required and what the condition is that links them; for example, ...

An infant is cuddled and protected by his mother. An adolescent girl is asked out on a date by a boy she had a crush on. A student athlete is carried off the field on the shoulders of his teammates ...

Future research on early relational health will need to expand to include relational health promotion and intergenerational mechanisms of healing and ensuring health and well-being across the life ...