'Table emp' presentation slideshows

Declarative Constraints for Complex Business Rules and Improved Performance

927 views • 78 slides

Oracle: A Relational Database System (RDBMS)

Oracle: A Relational Database System (RDBMS). Vandana Janeja 10 th February 2004 For : Database Systems 22:198:603 Prof. Vijay Atluri Adapted from material by Dr.Richard Holowczak and Dr.Soon Chun. Outline. Background SQL*PLUS SQL DDL DML DCL Examples. ODBC Driver. Oracle

701 views • 50 slides

ERM to SQL

ERM to SQL. Abstraction Layers. WHAT. Conceptual What data is held An Image and its meta-data Entity-Relationship model (ERM) Logical How data is organised in storage Block and Directory structure Tables, keys Physical How data is stored in bits JPEG as a stream of bytes

382 views • 24 slides

Integrity Constraints

Integrity Constraints. Integrity Constraints. It is mechanism used to prevent invalid data entry into the table. Types Domain integrity constraints Entity integrity constraints Referential integrity constraints. Domain integrity constraints. It is column level constraints

355 views • 13 slides