'Multi valued attributes' presentation slideshows

Mapping an ERD to a Relational Database

Mapping an ERD to a Relational Database. To map an ERD to a relational database, 4 rules are defined to govern how tables are constructed. Rule for entity types Rule for relationships Rule for attributes 4) Rule for participation constraint. Entities

529 views • 28 slides

CMIS 450: Database Design Dr. Bijoy Bordoloi

CMIS 450: Database Design Dr. Bijoy Bordoloi. Transforming E/R Diagrams to Relations. Represent Entities. Each entity-type in E/R Diagram becomes a Relation (Table)

416 views • 28 slides

Bringing It All Together in a Commercial RDBM Package

Packages such as Microsoft Access, FoxPro and Oracle support this functionality. Bringing It All Together in a Commercial RDBM Package. Good relational database software packages allows the user to:

298 views • 22 slides

ERD

ERD. Translation to tables. A Table Example. t1 = ( foo,bar,baz,x ) t2 = ( quz,bar,foo,y ) t1[a1] = ( baz ) t2[a2] = ({ y,z }) t1[a?] = ( baz ,{ x,y }) t2[ k ?] = ( quz,bar ). t1. t2. Vector of all key attributes. k? = (k1,k2) a? = (a1,a2). Vector of all non-key attributes.

301 views • 20 slides

Normalization

125 views • 12 slides