In SQL Server, we have several options when it comes to formatting a DATE or DATETIME value as MMDDYYYY. The two most common functions for formatting dates like this are CONVERT() and FORMAT().
dates
5 Functions that Extract the Month from a Date in DuckDB
Sometimes when working with SQL databases like DuckDB, we need to return the month part from a date for presentation or for further processing. DuckDB provides us with a handful of functions that can help in this regard.
In this article, we’ll look at five different functions we can use to extract the month from a date in DuckDB.
Subtract Months from a Date in DuckDB
If you find yourself in the situation where you need to subtract a number of months from a date in DuckDB, here are two options for you.
2 Ways to Get the Month Name from a Date in DuckDB
DuckDB offers a pretty good range of functions that enable us to get date parts from date or timestamp value. For example, we can extract the month part from a given date value. In most cases, this will be the month number, for example 08 or just 8.
But sometimes we might want to get the actual month name, like October for example. And other times we might just want the abbreviated month name, like Oct.
Fortunately, DuckDB’s got our back. Here are two ways to return the month name from a date or timestamp value in DuckDB.
Generating Date Ranges with DuckDB Queries
Working with date ranges is a common requirement in data analysis, reporting, and time-series operations. DuckDB provides us with several approaches for generating date ranges. This article explores various techniques for creating date ranges in DuckDB.
6 Functions for Working with the Unix Epoch in DuckDB
DuckDB offers a versatile set of functions to handle timestamps at various levels of precision. This article explores some of DuckDB’s functions that help us to convert between epoch representations and timestamps.
These specialized time conversion functions can be handy tools when working with temporal data, allowing seamless translation between human-readable timestamps and machine-optimized epoch representations at varying levels of precision.
The Difference Between DATE_DIFF() and DATE_SUB() in DuckDB
In DuckDB, the date_diff() (along with its synonym datediff()) and date_sub() (along with its synonym datesub()) functions allow us to get the difference between two dates. While they might seem similar, they actually calculate date differences in distinct ways that are important to understand for accurate data analysis.
Let’s take a look at the difference between these functions.
Get the Day Name from a Date in DuckDB
DuckDB provides us with a couple of ways to get the weekday name from a date or timestamp value. This could be the full day name, such as Monday, or the short/abbreviated day name, such as Mon.
Here are two ways to return the day name from a date in DuckDB.
Calculating Time Differences in DuckDB
DuckDB has emerged as a powerful analytical database system designed for fast in-memory data processing. One common analytical task involves calculating time differences between events—whether measuring intervals between transactions, tracking service response times, or analyzing temporal patterns in time series data.
This article provides an exploration of calculating time differences in DuckDB, covering both basic and slightly more advanced techniques.
Subtract Days from a Date in DuckDB
DuckDB provides us with a couple of easy ways to perform additions and subtractions on dates. In particular, we can use the - operator to do the job, or the date_add() operator combined with the - operator.
Here are two options for subtracting days from a date in DuckDB.