2. ใบความรู้ที่ 1
•Download as DOCX, PDF•
1 like•535 views
A database system consists of software, hardware, and personnel used to store and manage data. It includes a database, which organizes information into tables containing rows and columns. There are different types of database users like single-user, multi-user, and administrator. Popular database management systems include Microsoft Access, Microsoft SQL Server, MySQL, and Oracle. Key concepts in databases include entities, attributes, primary keys, foreign keys, and one-to-many relationships used to link tables.
2. ใบความรู้ที่ 1
- 4. (Single User) (Multi - User) (Network) (Intranet) Microsoft Access, Microsoft SQL Server, MySQL, Oracle 1. 2. (Column) 3. 4. 5. (Index) (Primary Key) 6. 7.
- 5. 1. (Entity) 2. (Attribute) 3. (One – to - Many) (Relationships)
- 6. 1. Primary Key ( ) Primary 2. Candidate Key 3. Key ( Composite ( ) Primary Primary Key Key ) Key Composite Key 4. Foreign Key ( Many) Primary Key One) ( One – to – Many (Relational Database) (StudentID) (Table) (Row) (Column) (File) (Record) (Field) (Relation) (Tuple) (Attibute) (Cardinality) (Degree) (Primary Key)