一、?? ?列?? ?轉(zhuǎn)?? ?行

create table STU_ROW2COL

(

id????? VARCHAR2(10),

intname VARCHAR2(10),

subject VARCHAR2(20),

grade?? NUMBER

)

insert into stu_row2col (ID, INTNAME, SUBJECT, GRADE) values ('1', 'ZORRO', '語(yǔ)文', 70);

insert into stu_row2col (ID, INTNAME, SUBJECT, GRADE) values ('2', 'ZORRO', '數(shù)學(xué)', 80);

insert into stu_row2col (ID, INTNAME, SUBJECT, GRADE) values ('3', 'ZORRO', '英語(yǔ)', 75);

insert into stu_row2col (ID, INTNAME, SUBJECT, GRADE) values ('4', 'SEKER', '語(yǔ)文', 65);

insert into stu_row2col (ID, INTNAME, SUBJECT, GRADE) values ('5', 'SEKER', '數(shù)學(xué)', 75);

insert into stu_row2col (ID, INTNAME, SUBJECT, GRADE) values ('6', 'SEKER', '英語(yǔ)', 60);

insert into stu_row2col (ID, INTNAME, SUBJECT, GRADE) values ('7', 'BLUES', '語(yǔ)文', 60);

insert into stu_row2col (ID, INTNAME, SUBJECT, GRADE) values ('8', 'BLUES', '數(shù)學(xué)', 90);

insert into stu_row2col (ID, INTNAME, SUBJECT, GRADE) values ('9', 'PG', '數(shù)學(xué)', 80);

insert into stu_row2col (ID, INTNAME, SUBJECT, GRADE) values ('10', 'PG', '英語(yǔ)', 90);

SQL>? select t.* from stu_row2col t ;

ID???????? INTNAME??? SUBJECT?????????????????? GRADE

---------- ---------- -------------------- ----------

11???????? ZORRO????? 語(yǔ)文???????????????????????? 77

1????????? ZORRO????? 語(yǔ)文???????????????????????? 70

2????????? ZORRO????? 數(shù)學(xué)???????????????????????? 80

3????????? ZORRO????? 英語(yǔ)???????????????????????? 75

4????????? SEKER????? 語(yǔ)文???????????????????????? 65

5????????? SEKER????? 數(shù)學(xué)???????????????????????? 75

6????????? SEKER????? 英語(yǔ)???????????????????????? 60

7????????? BLUES????? 語(yǔ)文???????????????????????? 60

8????????? BLUES????? 數(shù)學(xué)???????????????????????? 90

9????????? PG???????? 數(shù)學(xué)???????????????????????? 80

10???????? PG???????? 英語(yǔ)???????????????????????? 90

想要實(shí)現(xiàn)行專列， 就是輸出結(jié)果是這樣的：

SQL>? select * from ( select t.intname,t.subject,t.grade from stu_row2col t)

pivot(sum(grade) for subject in ('語(yǔ)文' 語(yǔ)文,'數(shù)學(xué)' 數(shù)學(xué),'英語(yǔ)' 英語(yǔ)))? ;

INTNAME??????????? 語(yǔ)文???????? 數(shù)學(xué)???????? 英語(yǔ)

---------- ---------- ---------- ----------

SEKER????????????? 65???????? 75???????? 60

BLUES????????????? 60???????? 90

PG??????????????????????????? 80???????? 90

ZORRO???????????? 147???????? 80???????? 75

二、?? ?行?? ?轉(zhuǎn)?? ?列

創(chuàng)建一個(gè)視圖：

create or replace view stu_col2row as

select "INTNAME","語(yǔ)文","數(shù)學(xué)","英語(yǔ)" from ( select t.intname,t.subject,t.grade from stu_row2col t) pivot(sum(grade) for subject in ('語(yǔ)文' 語(yǔ)文,'數(shù)學(xué)' 數(shù)學(xué),'英語(yǔ)' 英語(yǔ)));

SQL>? select INTNAME 姓名,km 科目, fs 分?jǐn)?shù) from stu_col2row unpivot(fs for km in(語(yǔ)文,數(shù)學(xué),英語(yǔ)));

姓名?????? 科目???????? 分?jǐn)?shù)

---------- ---- ----------

SEKER????? 語(yǔ)文???????? 65

SEKER????? 數(shù)學(xué)???????? 75

SEKER????? 英語(yǔ)???????? 60

BLUES????? 語(yǔ)文???????? 60

BLUES????? 數(shù)學(xué)???????? 90

PG???????? 數(shù)學(xué)???????? 80

PG???????? 英語(yǔ)???????? 90

ZORRO????? 語(yǔ)文???????? 70

ZORRO????? 數(shù)學(xué)???????? 80

ZORRO????? 英語(yǔ)???????? 75

總結(jié)

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