In PostgreSQL, you have the ability to define your own custom data types, known as user-defined types (UDTs). This allows you to create data structures that suit your specific needs, encapsulate complex logic, and enhance data integrity. User-defined types can be composed of existing built-in data types or even other user-defined types. Here are some…
The hstore data type is used to store key-value pairs within a single column. It provides a way to store arbitrary metadata or attributes associated with a row in a structured form. The hstore data type is essentially a map or dictionary, where keys are strings and values can be of various data types. Here…
The array data type in postgreSQL is used to store ordered collections of elements of the same data type. Arrays provide a way to store multiple values in a single column, allowing you to work with lists of data in a structured manner. Here are some key points about the array data type: Here’s an…
The jsonb data type is an extension of the json data type that provides a more efficient and flexible way to store and query JSON (JavaScript Object Notation) data in postgreSQL database. jsonb stands for “JSON binary,” and it stores JSON data in a binary format that allows for improved storage and indexing. Here are…
The json data type is used to store JSON (JavaScript Object Notation) data. JSON is a widely used data interchange format that represents structured data in a human-readable text format. PostgreSQL introduced native support for the json data type to store and manipulate JSON documents directly within the database. Here are some key points about…
UUID is a data type that represents Universally Unique Identifiers. UUIDs are 128-bit unique identifiers that are generated using specific algorithms, and they have a very low probability of being duplicated. This makes them useful for scenarios where unique identifiers are required, such as distributed systems, databases, or when generating random unique identifiers for applications….
The serial data type is not a true data type like integer or text. Instead, it is a shortcut for creating an auto-incrementing integer column in a table. It is commonly used to create primary key columns that automatically generate unique values when new rows are inserted. The serial type is used in combination with…
The enum data type is used to define a user-defined enumeration type. An enumeration type consists of a static, ordered set of values, each of which can represent a specific category or state. Enumerations provide a way to ensure that only valid values are stored in a column, enhancing data integrity. Here are some key…
The boolean data type is used to store two-state logical values, representing either true or false. It’s a fundamental data type used to model binary conditions, such as yes/no, on/off, or true/false situations. Here are some key points about the boolean data type: Here’s an example of using the boolean data type: CREATE TABLE subscription_info…
The interval data type is used to represent a period of time. It stores the time span between two points in time, such as days, hours, minutes, and seconds. The interval data type can be used for various purposes, such as measuring durations, time-based calculations, and storing time intervals for scheduling or event management. Here…