In PostgreSQL you can use the EXTRACT() function to get the month from a date.
You can also use the DATE_PART() function to do the same thing.
dates
Convert Month Number to Month Name in PostgreSQL
You can use the following code examples in PostgreSQL if you have a month number but you want the month name instead.
Convert Month Name to Month Number in PostgreSQL
In PostgreSQL, if you already have a month name, but you want to convert that name to the month number, you can do this with the EXTRACT() function.
Get the Month Name from a Date in PostgreSQL
If you’re familiar with PostgreSQL, you might know that you can use the EXTRACT() and the DATE_PART() functions to extract the month from a date. But those functions only allow you to extract the month number.
What if you need the month name?
You can get the month name from a date by using the TO_CHAR() function. This function returns a string based on the timestamp and the template pattern you provide as arguments.
How Language Settings can Affect your FORMAT() Results in SQL Server (T-SQL Examples)
It can be easy to forget that the T-SQL FORMAT() function provides locale-aware formatting. Locale-aware means that the locale can affect the results. In other words, the exact output you get will depend on the locale.
By default, the function uses the language of the current session to determine the locale. However, this can be overridden by passing a “culture” argument to the function. Doing this allows you to provide results for a particular locale without having to change the language of the current session.
This article contains examples of how locale can affect the results when using the FORMAT() function in SQL Server.
Custom Numeric Format Strings Supported by FORMAT() in SQL Server
This article provides a reference for the custom numeric format specifiers that can be used when formatting numbers using the FORMAT() function in SQL Server. Examples included.
What is a Format String in SQL Server?
In SQL Server, the FORMAT() function enables you to format date/time and number values as a formatted string by passing in a “format string” as the second argument (the first argument is the value that’s being formatted).
Here’s an example of this function in action:
FORMAT(@date, 'dd/MM/yyyy');
In this case the format string is dd/MM/yyyy.
This particular format string specifies that the @date value should be formatted with a two-digit day, two-digit month, and a four-digit year, in that order, and with forward slashes as the separators.
This would result in something like this:
21/05/2019
Custom Date/Time Format Strings Supported by FORMAT() in SQL Server
This article provides a reference for the custom date and time format specifiers that can be used when formatting dates and/or times using the FORMAT() function in SQL Server, along with examples.
You can combine any of these format specifiers to produce a customized format string. See below for a code example and an explanation on how custom format strings work.
Standard Date/Time Format Strings Supported by FORMAT() in SQL Server
This article provides a list of the standard date and time format strings that can be used when formatting dates and/or times using the FORMAT() function in SQL Server, along with examples using different cultures and data types.
These are the standard date and time format specifiers that are supported by the .NET Framework, and therefore, SQL Server. Each standard date and time format string is an alias for a custom date and time format string.
How to Specify the Invariant Culture when using FORMAT() in SQL Server
In SQL Server, you can use the FORMAT() function to format date/time and number values as strings. In particular, the function provides “locale-aware” formatting, and the function accepts a “culture” argument, which allows you to specify a culture or language to use for the actual format. For example, you can pass en-us to ensure the results are formatted in US English format.
The culture argument is optional, so if you don’t provide it, the output will be determined by the language of the current session.
The FORMAT() function accepts any culture supported by the .NET Framework as an argument (you’re not limited to the languages explicitly supported by SQL Server).
One of the cultures supported by the .NET Framework is the invariant culture. The invariant culture is culture-insensitive. More specifically, this culture is associated with the English language but not with any country/region.
To specify that FORMAT() should output the results using the invariant culture, simply use "iv" for the culture argument (the third argument).