OCP-047 Pivoting INSERT

17. View the Exhibit and examine the structure of the MARKS_DETAILS and MARKS
tables.Which is the best method to load data from the MARKS_DETAILS table
to the MARKS table?
A. Pivoting INSERT
B. Unconditional INSERT
C. Conditional ALL INSERT
D. onditional FIRST INSERT
Answer: A

create table MARKS_DETAILS
(
  student_id      NUMBER(4),
  subject_id      NUMBER(2),
  marks_english   NUMBER,

 s1              NUMBER,
  marks_math      NUMBER,

 s2              NUMBER,
  marks_physics   NUMBER,

  s3              NUMBER,
  marks_chemistry NUMBER,

  s4              NUMBER
  marks_biology   NUMBER,
 );

insert into MARKS_DETAILS values(10,1,100,2,120,3,90,4,110,5,88);

create table MARKS
(
  student_id NUMBER(4),
  subject_id NUMBER(2),
  marks      NUMBER
);

insert all
into marks values(student_id,subject_id,marks_english)
into marks values(student_id,s1,marks_math)
into marks values(student_id,s2,marks_physics)
into marks values(student_id,s3,marks_chemistry)
into marks values(student_id,s4,marks_biology)
select student_id,subject_id,s1,s2,s3,s4,marks_english,marks_math,
marks_physics,marks_chemistry,marks_biology
from marks_details;
 

eg2:

某表含有

表头 ID  ， 年，1月预算,2月预算,3月预算
表值 col1,2012年,      a,     b,     c


这样的5个字段，
我想转成
col1,2012年，1月, a
col1,2012年，2月, b
col1,2012年，3月, c

需要转换的表：test

insert all 
into target_test values(id,year,'1月',month1)
into target_test values(id,year,'2月',month2)
into target_test values(id,year,'3月',month3)
select id,year,month1,month2, month3 from test;