How Can I Extract the Last Element from a String in SQL?

Partitioning Strings to Acquire Terminal Elements

Question:

In a data table containing strings such as:

Articles/Search/ArtMID/2681/ArticleID/2218/Diet.aspx
OurStory/MeettheFoodieandtheMD.aspx
TheFood/OurMenu.aspx

How can we isolate and extract the final element (e.g., "Diet.aspx", "MeettheFoodieandtheMD.aspx", "OurMenu.aspx") from each string?

Answer:

In SQL, this can be achieved using the following syntax:

SELECT SUBSTRING(string, LEN(string) - CHARINDEX('/', REVERSE(string)) + 2, LEN(string))
FROM SAMPLE;

Explanation:

• LEN(string): Determines the length of the input string.
• REVERSE(string): Reverses the string to make it easier to locate the last occurrence of the forward slash (/).
• CHARINDEX('/', REVERSE(string)): Finds the position of the last forward slash in the reversed string.
• LEN(string) - CHARINDEX('/', REVERSE(string)) 2: Calculates the starting position of the substring, excluding the forward slash.
• SUBSTRING(string, starting position, length): Extracts the desired substring from the input string.

Here's a JSFiddle for reference: http://sqlfiddle.com/#!3/41ead/11

The above is the detailed content of How Can I Extract the Last Element from a String in SQL?. For more information, please follow other related articles on the PHP Chinese website!