Database development

Database Development: Advanced Topics

For most organizations, the process of data collection and storage is an important step in the data-driven organization. The challenges that exist with data storage can be broken down into three main areas: architecture, implementation, and management.

Each of these areas presents unique challenges to the organization, but can be effectively addressed by a team of qualified professionals. It is important to have a solid understanding of how your organization’s data will end up being stored, as well as how it will be structured.

Database Development: Queries

A database query is a statement that retrieves data from the database using one or more criteria. In a relational database, a query statement is typically a SELECT statement, which returns all of the rows in any table that match the specified criteria. In an object-oriented database, the syntax may be slightly different, but the concept is essentially the same: retrieve all rows that match some condition.

Another important aspect of a query is to be able to logically group data into meaningful categories. Without this ability, you risk having to sift through huge volumes of irrelevant information.

Database Development: Relationships

A database is a structured collection of tables and data. A relationship is a connection between two tables in a database, such as a one-to-many or many-to-one. Relationships are created when you create a table and insert records into it.

A one-to-many relationship means that one record can have many related records. For example, if you have customers, and each customer has an address, then this is a one-to-many relationship.

Many-to-one relationships mean that one record can have only one related record. For example, if you have customers, and each customer can order items, then this is a many-to-one relationship.

There are three types of relationships: functional relationships, referential relationships, and transactional relationships. Any two tables with the same type of relationship are considered functional relationships. For example, if you have customers and orders, both of which are functional tables, then these are functional relationships.

Database Development: Fields

Fields are the underlying building blocks of a database. They form the core of everything you do when you perform database management. A field is a set of data that can be used to represent something in a database. Each field has a specific purpose, and is often used for storing different types of information. Fields may be organized into different fields types, such as integer, text, date, etc.

There are many different fields types that may be used in a database, including:

  • Int - Integer
  • Text - Text
  • Date/Time - Date/Time
  • Array - ArrayType>
  • Object - ObjectType> (e.g. RecordRecordType> )

Database Development: Tables

Tables are the foundation of any database. They're where you store your data, and they'll look different depending on the type of database you're using. For example, a table in a relational database will likely be organized into rows and columns, while a table in an object-based database might be more like a list of objects that each have properties.