'Foreign key constraint' presentation slideshows

Oracle Data Definition Language (DDL)

Oracle Data Definition Language (DDL). Dr. Bernard Chen Ph.D. University of Central Arkansas. In this lecture. You will learn about Data Definition Language (DDL) statements to work with the structure of an Oracle database table.

662 views • 47 slides

CHAPTER 3 THE RELATIONAL MODEL

CHAPTER 3 THE RELATIONAL MODEL. THE DBMS OF A RELATIONAL MODEL OF DATA (RMD). As stated previously, a DBMS includes A collection of databases ( which can communicate with each other ). DDL ? QL ? SQL DML ?

642 views • 46 slides

System Catalog for SQL Server

System Catalog for SQL Server. Syscolumns Syscomments Sysconstraints (view) Sysdepends Sysfilegroups Sysfiles Sysforeignkeys Sysfulltextcatalogs sysindexes. Sysindexkeys Sysmembers Sysobjects Syspermissions Sysprotects Sysreferences Systypes sysusers. Database System Tables.

472 views • 39 slides

System Catalog for SQL Server

System Catalog for SQL Server. Master Database. Tracks the server installation as a whole Tracks other databases Tracks such things as File allocations and usage Disk space Configuration settings Logins Other SQL Servers. Sysaltfiles Syslockinfo Syscacheobjects Syslogins Syscharsets

467 views • 36 slides

Including Constraints

Including Constraints. Objectives. After completing this lesson, you should be able to do the following: Describe constraints Create and maintain constraints. What Are Constraints?. Constraints enforce rules at the table level.

423 views • 28 slides

The Relational Database Model & The Database Development Process

393 views • 25 slides

Constraints

Constraints. Primary Key Constraint. It is derived from the entity UID or created as surrogate key. Uniqueness is enforced by an index: Index is not defined in Oracle Designer All columns in key are mandatory. It should not be updatable. Every table should have one!. Unique Key Constraint.

274 views • 20 slides

Principles of Database Systems With Internet and Java Applications

244 views • 17 slides