兩種表示,都是一樣的
- 1.TRIM([ { (LEADING | TRAILING | BOTH)[ trim_character ] | trim_character } FROM ] trim_source )
2. trim([leading | trailing | both] trim_char from string)
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'