During the menstrual cycle, an egg is released from one of the womanâs ovaries and travels down the fallopian tube. The egg only lives for 24 hours after ovulation, and a sperm must meet the egg within that period for pregnancy to happen.uring the menstrual cycle, an egg is released from one of the womanâs ovaries and travels down the fallopian tube. The egg only lives for 24 hours after ovulation, and a sperm must meet the egg within that period for pregnancy to happen.
A set of attributes is called a relation schema (or relation scheme). A relation schema is also known as table schema (or table scheme).A relation schema can be thought of as the basic information describing a table or relation. It is the logical definition of a table.Relation schema defines what the name of the table is. This includes a set of column names, the data types associated with each column. set of attributes is called a relation schema (or relation scheme). A relation schema is also known as table schema (or table scheme).
A relational database schema is the tables, columns and relationships that make up a relational database. A schema is often depicted visually in modeling software such as ERwin or drawing software such as Viso. A relational database schema is the tables, columns and relationships that link together the components into a database.