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…

The timestamp data type is used to store date and time values together, including both the date and the time of day. It’s a combination of the date and time information, represented as a single data type. Here are some key points about the timestamp data type: Here’s an example of using the timestamp data…

The time data type is used to store time of day values without any associated date information. It represents a specific time on the clock, including hours, minutes, seconds, and fractions of a second. Here are some key points about the time data type: Here’s an example of using the time data type: CREATE TABLE…

The date data type is used to store dates without any associated time information. It represents a specific day in the calendar, including the year, month, and day. Here are some key points about the date data type: Here’s an example of using the date data type: CREATE TABLE tasks (task_id serial PRIMARY KEY, task_name…

The text data type is used to store variable-length character strings, similar to the varchar data type. However, there is a subtle difference between text and varchar. While both types store strings of varying lengths without padding, the text type is more versatile and internally optimized for efficient storage. Here are some key points about…

The varchar data type is used to store variable-length character strings. Unlike the char data type, which stores strings of fixed length, the varchar data type can store strings of varying lengths without padding. Here are some key points about the varchar data type: Here’s an example of using the varchar data type: CREATE TABLE…