Understanding Entity Relationship Diagrams

What symbol is used to represent an entity in an ERD?

Apakah simbol yang mewakili sesuatu entiti dalam ERD?

• Oval

  Bujur

• Triangle

  Segitiga

• Rectangles

  Segiempat tepat

• Circle

  Bulat

What does a diamond symbol represent in an ERD?

Bentuk diamond dalam Rajah Hubungan Entiti mewakili

• an entity

  entiti

• an attribute

  atribut

• a Relationship

  hubungan

• a primary key

  kunci primer

What is the purpose of an Entity Relationship Diagram (ERD)?

Apakah tujuan Rajah Hubungan Entiti dibina?

• To visualize the logical structure of databases

  Menunjukkan struktur logik pangkalan data secara visual

• To represent relationships between entities

  Mewakili hubungan antara entiti

• To create flowcharts for data processes

  Menghasilkan carta alir bagi proses data

• To store information about entities

  Menyimpan maklumat berkenaan entiti

Which symbol is used to represent an attribute in an ERD?

Simbol yang manakah mewakili atribut dalam Rajah Hubungan Entiti?

• Solid line

  garisan

• Oval

  bujur

• Rectangle

  Segiempat tepat

• Diamond

What type of attribute is used to uniquely identify an entity?

Apakah jenis atribut yang digunakan bagi mengenalpasti sesuatu entiti secara unik?

• Foreign Key

  Kunci asing

• Composite Attribute

  Atribut komposit

• Primary Key

  Kunci Utama

• Multivalued Attribute

  Atribut multinilai