CREATE TABLE t_col_row(ID INT,c1 VARCHAR2(10),c2 VARCHAR2(10),c3 VARCHAR2(10)
);INSERT INTO t_col_row VALUES (1, 'v11', 'v21', 'v31');
INSERT INTO t_col_row VALUES (2, 'v12', 'v22', NULL);
INSERT INTO t_col_row VALUES (3, 'v13', NULL, 'v33');
INSERT INTO t_col_row VALUES (4, NULL, 'v24', 'v34');
INSERT INTO t_col_row VALUES (5, 'v15', NULL, NULL);
INSERT INTO t_col_row VALUES (6, NULL, NULL, 'v35');
INSERT INTO t_col_row VALUES (7, NULL, NULL, NULL);
COMMIT;SELECT * FROM t_col_row;

SELECT id, 'c1' cn, c1 cvFROM t_col_row
UNION ALL
SELECT id, 'c2' cn, c2 cvFROM t_col_row
UNION ALL
SELECT id, 'c3' cn, c3 cv FROM t_col_row;

WHERE COLUMN IS NOT NULL  

SELECT id, cn, cv FROM t_col_row
MODEL
RETURN UPDATED ROWS
PARTITION BY (ID)
DIMENSION BY (0 AS n)
MEASURES ('xx' AS cn,'yyy' AS cv,c1,c2,c3) --xx、yyy表示字段长度
RULES UPSERT ALL
(cn[1] = 'c1',cn[2] = 'c2',cn[3] = 'c3',cv[1] = c1[0],cv[2] = c2[0],cv[3] = c3[0]
)
ORDER BY ID,cn;

create TYPE cn_pair as OBJECT(cn VARCHAR(10),cv VARCHAR2(10));
CREATE TYPE cv_varr AS VARAY(8) OF cv_pair;select id,t.cn AS cn,t.cv AS cvFROM t_col_row,TABLE(cv_varr(cv_pair('c1',t_col_row.c1),cv_pair('c2',t_col_row.c2),cv_pair('c3',t_col_row.c3)))  t
ORDER BY 1,2

CREATE TABLE t_row_col AS
SELECT id, 'c1' cn, c1 cvFROM t_col_row
UNION ALL
SELECT id, 'c2' cn, c2 cvFROM t_col_row
UNION ALL
SELECT id, 'c3' cn, c3 cv FROM t_col_row;SELECT * FROM t_row_col ORDER BY 1,2;

select id ,max(decode(cn,'c1',cv,null)) as cl,max(decode(cn,'c2',cv,null)) as c2,max(decode(cn,'c3',cv,null))  as c3
from t_row_col
group by id
order by 1

select mgr,depton,ename from scott.emp order by 1,2;select mgr,deptno,max(decode(empno,'7788',ename,null)) "7788",max(decode(empno,'7902',ename,null)) "7902",MAX(decode(empno, '7844', ename, NULL)) "7844",MAX(decode(empno, '7521', ename, NULL)) "7521",MAX(decode(empno, '7900', ename, NULL)) "7900",MAX(decode(empno, '7499', ename, NULL)) "7499",MAX(decode(empno, '7654', ename, NULL)) "7654"
from scott.emp
where mgr in (7566,7698)and deptno in (20,30)
group by mgr,deptno
order by 1,2