Freaks City

Core Mechanisms of Dameng Data WatchDameng (DM) database high availability clusters are established through the Data Watch framework. The foundational mechanism involves transmitting Redo logs from the primary instance to standby instances, which then apply these logs to maintain data synchronization. By manipulating specific parameters and int ...

Database Constraints in DaMeng What Are Constraints? Constraints are rules enforced on table columns to insure data integrity. They guarantee both accuracy and validity of stored data. Constraint Types Primary Key Constraint A primary key uniquely identifies each row in a table. This field must contain unique, non-null values. Creating a table ...