In Oracle/PLSQL, the trim function removes all specified characters either from the beginning or the ending of a string.
The syntax for the trim function is:
trim( [ leading | trailing | both [ trim_character ] ] string1 )
leading - remove trim_string from the front of string1.
trailing - remove trim_string from the end of string1 .
both - remove trim_string from the front and end of string1 .
If none of these are chosen (ie: leading, trailing, both), the trim function will remove trim_string from both the front and end of string1
trim_character is the character that will be removed from string1 . If this parameter is omitted, the trim function will remove all leading and trailing spaces from string1 .
string1 is the string to trim.
For example:
trim(' tech ') | would return 'tech' |
trim(' ' from ' tech ') | would return 'tech' |
trim(leading '0' from '000123') | would return '123' |
trim(trailing '1' from 'Tech1') | would return 'Tech' |
trim(both '1' from '123Tech111') | would return '23Tech' |
