specific - sql trim characters from string
How do I remove the first characters of a specific column in a table? (8)
Here's a simple mock-up of what you're trying to do :)
CREATE TABLE Codes ( code1 varchar(10), code2 varchar(10) ) INSERT INTO Codes (CODE1, CODE2) vALUES ('ABCD1234','') UPDATE Codes SET code2 = SUBSTRING(Code1, 5, LEN(CODE1) -4)
So, use the last statement against the field you want to trim :)
The SUBSTRING function trims down Code1, starting at the FIFTH character, and continuing for the length of CODE1 less 4 (the number of characters skipped at the start).
In SQL, how can I remove the first 4 characters of values of a specific column in a table? Column name is
Student Code and an example value is
I want to remove first 4 chars from my table for all records
Please guide me
If you have to remove the first few characters that are preceded by a special character like
#, this is a good one:
UPDATE tblInvalidID SET [ColumnName] =stuff(ColumnName, 1, charindex('#', ColumnName), ' ')
The Complete thing
DECLARE @v varchar(10) SET @v='#temp' select STUFF(@v, 1, 1, '') WHERE LEFT(@v,1)='#'
There's the built-in trim function that is perfect for the purpose.
SELECT trim(both 'ag' from 'asdfg'); btrim ------- sdf (1 riga)
update table YourTable set YourField = substring(YourField, 5, len(YourField)-3);
Why use LEN so you have 2 string functions? All you need is character 5 on...
...SUBSTRING (Code1, 5, 8000)...
SELECT RIGHT(MyColumn, LEN(MyColumn) - 4) AS MyTrimmedColumn
Edit: To explain, RIGHT takes 2 arguments - the string (or column) to operate on, and the number of characters to return (starting at the "right" side of the string). LEN returns the length of the column data, and we subtract four so that our RIGHT function leaves the leftmost 4 characters "behind".
Hope this makes sense.
Edit again - I just read Andrew's response, and he may very well have interperpereted correctly, and I might be mistaken. If this is the case (and you want to UPDATE the table rather than just return doctored results), you can do this:
UPDATE MyTable SET MyColumn = RIGHT(MyColumn, LEN(MyColumn) - 4)
He's on the right track, but his solution will keep the 4 characters at the start of the string, rather than discarding said 4 characters.
Stuff(someColumn, 1, 4, '')
This says, starting with the first
1 character position, replace
4 characters with nothing