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Database Normalization Database normalization is a database design principle for organizing data in an organized and consistent way. It helps you avoid redundancy and maintain the integrity of the database. It also helps you eliminate undesirable characteristics associated with insertion, deletion, and updating. Purpose of Normalization The main purpose of database normalization is to avoid comp..

key It is used to uniquely identify any record or row of data from the table. It is also used to establish and identify relationships between tables. In the PERSON table, passport_number, license_number, SSN are keys since they are unique for each person. Primary key - It is the first key used to identify one and only one instance of an entity uniquely. An entity can contain multiple keys, as we..

Attribute A property or characteristic of an entity. Often shown as an oval or circle. For instance, each one of these entities is going to have what we call attributes, which are various properties or traits. In this case, under the customer entity, we have a customer id. Entities and attributes in the database Entities in your database will be the rows, and the attributes in your database will..

ERD An Entity Relationship Diagram A type of flowchart that illustrates how “entities” such as people, objects or concepts relate to each other within a system. For instance, if there are writer, novel, consumer, they can be dipicted as below. Entity A definable thing—such as a person, object, concept or event—that can have data stored about it. Think of entities as nouns. Examples: a customer, ..

1. Click '+' to get the Data Source 2. Named in 'Name', I named cpu ad dev in my case. 3. Set up the host, user, pw, port. 4. Click 'Test Connection' 5. It will get all the data, then click 'OK'.