The soil should not be soaking wet. 5. When the calendula seedlings are about 3 inches (7.62 cm) high, thin them so that the remaining plants are 8 to 12 inches (20.32 to 30.48 cm) apart. 6. Apply a thin layer of compost to the calendula plants in midsummer.
Home : Software Terms : Relational Database Definition. Relational Database. A relational database is a database model that stores data in tables. The vast majority of databases used in modern applications are relational, so the terms database and relational database are often used synonymously.
In simplest terms, a relational database is one that presents information in tables with rows and columns. A table is referred to as a relation in the sense that it is a collection of objects of the same type (rows).Data in a table can be related according to common keys or concepts, and the ability to retrieve related data from a table is the basis for the term relational database.QL is a language designed to be used with relational databases. There is a set of basic SQL commands that is considered standard and is used by all RDBMSs. For example, all RDBMSs use the SELECT statement.