3. þ B. The INSTR function returns the position that the nth occurrence
of the search string may be found after starting the search from a given
start position. The search string is the underscore character, and the third
occurrence of this character starting from position 5 in the source string
occurs at position 14.
ý A, C, and D. Since position 4 is the first occurrence of the search string
and position 12 is the third occurrence if the search began at position 1.
Bạn đang xem 3. - OCA OCP ORACLE DATABASE 11G A LL IN ONE EXAM GUIDE P51 PPS