xwlxw的专栏

1st Normal Form Definition A database is in first normal form if it satisfies the following conditions: Contains only atomic valuesThere are no repeating groups An atomic value is a value that ca

3rd Normal Form Definition A database is in third normal form if it satisfies the following conditions: It is in second normal formThere is no transitive functional dependency By transitive funct

2nd Normal Form Definition A database is in second normal form if it satisfies the following conditions: It is in first normal formAll non-key attributes are fully functional dependent on the prim

十个普遍的数据库设计误解 Poor design/planning Ignoring normalization Poor naming standards Lack of documentation One table to hold all domain values Using identity/guid columns as your only key Not u