IMS DB – DL/I Terminology
Hierarchical databases work on the relationships between two or more segments. The following example shows how segments are related to each other in the IMS database structure. Root Segment Points…
IMS DB – Structure
Hierarchical Structure An IMS database is a collection of data accommodating physical files. In a hierarchical database, the topmost level contains the general information about the entity. As we proceed…
IMS DB – Home
IMS stands for Information Management System. IMS was developed by IBM with Rockwell and Caterpillar in year 1966 for the Apollo program to send a man to the moon. It…
DB2 – LDAP
Introduction LDAP is Lightweight Directory Access Protocol. LDAP is a global directory service, industry-standard protocol, which is based on client-server model and runs on a layer above the TCP/IP stack.…
DB2 – Roles
Introduction A role is a database object that groups multiple privileges that can be assigned to users, groups, PUBLIC or other roles by using GRANT statement. Restrictions on roles A…
DB2 – Database Security
This chapter describes database security. Introduction DB2 database and functions can be managed by two different modes of security controls: AuthenticationAuthorization Authentication Authentication is the process of confirming that a…
DB2 – Backup and Recovery
This chapter describes backup and restore methods of database. Introduction Backup and recovery methods are designed to keep our information safe. In Command Line Interface (CLI) or Graphical User Interface…
DB2 – with XML
This chapter describes use of XML with DB2. Introduction PureXML feature allows you to store well-formed XML documents in columns of database tables. Those columns have XML database. Data is…
DB2 – Views
This chapter describes introduction of views, creating, modifying and dropping the views. Introduction A view is an alternative way of representing the data stored in the tables. It is not…
DB2 – Sequences
This chapter introduces you to the concept of sequence, creation of sequence, viewing the sequence, and dropping them. Introduction A sequence is a software function that generates integer numbers in…
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