Relationships in Oracle Databases


Relationships can be defined as correspondences between two variables. They can also be described as causal relationships. For example, a person’s talent in one area will probably be indicative of a good performance in another. This type of relationship can be useful to study human performance, since it can explain how two variables perform synchronized activities.

Relationships between people

Often relationships are defined by their status, and there are two main types of relationships between people: reciprocal and receptive. Reciprocal relationships are beneficial for both parties but can quickly go sour if the person with more authority abuses his position.

Relationships between tables

There are two different types of relationship between tables in an Oracle database. One type is known as a one-to-many relationship. This type of relationship allows records in one table to relate to many records in another table. For example, a product in a products table may relate to multiple records in an operations table. A more complex relationship is a many-to-many relationship. This type of relationship requires the creation of a third table, known as an associate table.

Relationships between people and things

Relationships between people and things are important for many reasons. Humans, for example, are drawn to other people and animals, and we seek connections between different things. Whether we are in love with someone or are engaged in a serious relationship, a relation can be defined as a link between two subjects. Generally, the term relationship is used informally, but it is formalized when referring to a link between two people or groups, or two countries. For example, two countries can have excellent diplomatic relations.

Relationships between variables

There are a variety of ways to study relationships between variables, including correlational analysis and regression. The goal of these methods is to identify the relationship between two or more variables, and to quantify that relationship. The relationship may be positive, negative, linear, or nonlinear.

Characteristics of healthy relationships

The key to a healthy relationship is a willingness to be open and honest with each other. When problems arise, healthy couples will talk them out and come up with solutions. They know that avoiding problems only makes them bigger. Avoidance and miscommunication are hallmarks of unhealthy relationships.

Characteristics of unhealthy relationships

Unhealthy relationships often have common characteristics. If your relationship reveals any of these traits, you should seek help. Open discussions with your partner can help the relationship grow and improve. Nevertheless, you should remain calm and unreactive when initiating these discussions.