May 2005
Intermediate to advanced
352 pages
14h 39m
English
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Name
CONCAT_WS( )
Synopsis
CONCAT_WS(separator,string, . . . )
This function combines strings of text and columns together with a separator specified in the first argument. Any number of strings may be specified after the first argument, with each argument separated by a comma. Null values are ignored.
SELECT CONCAT_WS('|', student_id, name_last, name_first)
AS 'student_record'
FROM students LIMIT 3;
+-----------------------------+
| student_record |
+-----------------------------+
| 433342000|Dyer|Russell |
| 434892001|Dyer|Marie |
| 433892002|Zabalaoui|Michael |
+-----------------------------+Here the vertical bar is used to separate the columns. This function can be useful for exporting data to formats acceptable to other software. However, you will require some programming to export the data to an external file using an SQL statement such as this one.
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.