to_dsinterval converts a character string of CHAR,
VARCHAR2, NCHAR, or NVARCHAR2 datatype to an INTERVAL DAY TO SECOND
type.
- char is the character string to be converted.
- The only valid nlsparam you can specify in this
function is NLS_NUMERIC_CHARACTERS. This argument can have the form:
NLS_NUMERIC_CHARACTERS = &dg&
where d and g represent the decimal character and group separator
respectively.