Account
Sign in to you account
Sign In Sign Up

How to Create Generate_series Function In Postgresql?

2 minutes read

To create a generate_series function in PostgreSQL, you will need to define a function that uses a query to generate a series of numbers or dates. This query typically uses the generate_series function provided by PostgreSQL to generate the desired series. You can customize the function to specify the start and end values of the series, as well as the increment or interval between values. By creating a generate_series function, you can easily generate a series of numbers or dates for various purposes within your PostgreSQL database environment.


What is the maximum depth of recursion allowed with the generate_series function?

The maximum depth of recursion allowed with the generate_series function in Postgres is 1000. This means that the function can be called recursively up to a depth of 1000 levels before an error is thrown.


How to use the generate_series function with custom start and end values?

The generate_series function in PostgreSQL is used to generate a series of integer values. By default, it starts at 1 and ends at the specified value. However, it is also possible to specify custom start and end values.


To use the generate_series function with custom start and end values, you can use the following syntax:

1
2

SELECT * 
FROM generate_series(start_value, end_value) num;


Replace start_value and end_value with the desired custom values. For example, if you want to generate a series of numbers from 5 to 10, you can use the following query:

1
2

SELECT * 
FROM generate_series(5, 10) num;


This will generate a series of numbers from 5 to 10:

1
2
3
4
5
6
7
8

num
---
5
6
7
8
9
10



What data types can be used with the generate_series function in PostgreSQL?

The generate_series function in PostgreSQL can be used with the following data types:

  1. Integer
  2. BigInt
  3. SmallInt
  4. Numeric
  5. Timestamp
  6. Date


These data types can be used to generate a series of values within specified ranges or intervals.

Facebook Twitter LinkedIn Telegram Whatsapp

Related Posts:

How to Read A Json Column From Postgresql Into Java?
To read a JSON column from PostgreSQL into Java, you can use the PostgreSQL JDBC driver to connect to the database and retrieve the JSON data. Here are the general steps to achieve this:First, establish a connection to the PostgreSQL database using the JDBC dr...
How to Handle Binary Data Between Python And Postgresql?
When working with binary data between Python and PostgreSQL, you can use the psycopg2 library to handle the interaction between the two. In Python, you can use the Bytea data type to represent binary data, and when inserting binary data into a PostgreSQL datab...
How to Use Coalesce With Interval In Postgresql?
In PostgreSQL, the COALESCE function is used to return the first non-NULL value in a list of arguments. When working with intervals in PostgreSQL, you can use COALESCE to handle NULL interval values by replacing them with a default interval value.For example, ...
How to Save Binary Type In Postgresql?
To save binary data types in PostgreSQL, you can use the bytea data type. This option allows you to store binary data such as images, videos, or files directly in the database.When inserting binary data into a bytea column, you need to encode the data into a b...
How to Use the Date Range In Postgresql Stored Function?
To use date ranges in a PostgreSQL stored function, you can define input parameters as date or timestamp types to represent the date range. Within the function, you can then utilize built-in date range operators such as '&&', which checks for o...