在关系数据库中，数据被分散到不同的表(Table)中。表是一个二维对象，是由行和列组成的数据集合。表中的每一列称为一个字段(Field)，表中的每一行称为一条记录(Record)。-In a relational database, data is distributed to different tables (Table) in the. Table is a two-dimensional object is formed by the rows and columns of data collection. Each column in the table is called a field (Field), each row of the table as one record (Record).