|Oracle® Database SQL Reference
10g Release 2 (10.2)
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expr with all occurrences of each character in
from_string replaced by its corresponding character in
to_string. Characters in
expr that are not in
from_string are not replaced. If
expr is a character string, then you must enclose it in single quotation marks. The argument
from_string can contain more characters than
to_string. In this case, the extra characters at the end of
from_string have no corresponding characters in
to_string. If these extra characters appear in
char, then they are removed from the return value.
You cannot use an empty string for
to_string to remove all characters in
from_string from the return value. Oracle Database interprets the empty string as null, and if this function has a null argument, then it returns null.
TRANSLATE provides functionality related to that provided by the
REPLACE lets you substitute a single string for another single string, as well as remove character strings.
TRANSLATE lets you make several single-character, one-to-one substitutions in one operation.
This function does not support
CLOB data directly. However,
CLOBs can be passed in as arguments through implicit data conversion.
The following statement translates a book title into a string that could be used (for example) as a filename. The
from_string contains four characters: a space, asterisk, slash, and apostrophe (with an extra apostrophe as the escape character). The
to_string contains only three underscores. This leaves the fourth character in the
from_string without a corresponding replacement, so apostrophes are dropped from the returned value.
SELECT TRANSLATE('SQL*Plus User''s Guide', ' */''', '___') FROM DUAL; TRANSLATE('SQL*PLUSU -------------------- SQL_Plus_Users_Guide