DROP TABLEt_change_lc;
CREATE TABLE t_change_lc (card_code VARCHAR2(3), q NUMBER, bal NUMBER);
INSERT INTOt_change_lc
SELECT ‘001‘ card_code, ROWNUM q, trunc(dbms_random.VALUE * 100) bal FROM
dualCONNECT BY ROWNUM <= 4
UNION
SELECT ‘002‘ card_code, ROWNUM q, trunc(dbms_random.VALUE * 100) bal FROM
dualCONNECT BY ROWNUM <= 4;
SELECT * FROMt_change_lc;
SELECT a.card_code, SUM(decode(a.q, 1, a.bal, 0))
q1,
SUM(decode(a.q, 2, a.bal, 0)) q2,
SUM(decode(a.q, 3, a.bal, 0)) q3,
SUM(decode(a.q, 4, a.bal, 0)) q4
FROM t_change_lc a
GROUP BY a.card_code
ORDER BY 1;
--行列转换列转行
DROP TABLE t_change_cl;
CREATE TABLE t_change_cl AS
SELECT a.card_code,
SUM(decode(a.q, 1, a.bal, 0)) q1,
SUM(decode(a.q, 2, a.bal, 0)) q2,
SUM(decode(a.q, 3, a.bal, 0)) q3,
SUM(decode(a.q, 4, a.bal, 0)) q4
FROM t_change_lc a
GROUP BY a.card_code
ORDER BY 1;
SELECT * FROMt_change_cl;
SELECT t.card_code,
t.rn q,
decode(t.rn, 1, t.q1, 2, t.q2, 3, t.q3, 4, t.q4) bal
FROM (SELECT a.*, b.rn
FROM t_change_cl a,
(SELECT ROWNUM rn FROM dual CONNECT BY ROWNUM <= 4) b) t
ORDER BY 1, 2;
--行列转换行转列合并
DROP TABLE t_change_lc_comma;
CREATE TABLE t_change_lc_comma AS SELECT card_code,‘quarter_‘||q AS q
FROMt_change_lc;
SELECT * FROM t_change_lc_comma;
SELECT t1.card_code,substr(MAX(sys_connect_by_path(t1.q,
‘;‘)), 2) q
FROM (SELECT a.card_code,
a.q,
row_number() over(PARTITION BY a.card_code ORDER BY a.q) rn
FROM t_change_lc_comma a) t1
START WITH t1.rn = 1
CONNECT BY t1.card_code = PRIOR t1.card_code
AND t1.rn - 1 = PRIOR t1.rn
GROUP BY t1.card_code;
--行列转换列转行分割
DROP TABLE t_change_cl_comma;
CREATE TABLE t_change_cl_comma AS
SELECT t1.card_code, substr(MAX(sys_connect_by_path(t1.q, ‘;‘)), 2) q
FROM (SELECT a.card_code,
a.q,
row_number() over(PARTITION BY a.card_code ORDER BY a.q) rn
FROM t_change_lc_comma a) t1
START WITH t1.rn = 1
CONNECT BY t1.card_code = PRIOR t1.card_code
AND t1.rn - 1 = PRIOR t1.rn
GROUP BY t1.card_code;
SELECT * FROMt_change_cl_comma;
SELECT t.card_code,
substr(t.q,
instr(‘;‘ || t.q, ‘;‘, 1, rn),
instr(t.q || ‘;‘, ‘;‘, 1, rn) - instr(‘;‘ || t.q, ‘;‘, 1, rn)) q
FROM (SELECT a.card_code, a.q, b.rn
FROM t_change_cl_comma a,
(SELECT ROWNUM rn FROM dual CONNECT BY ROWNUM <= 100) b
WHERE instr(‘;‘ || a.q, ‘;‘, 1, rn) > 0) t
ORDER BY 1, 2;
-- 实现一条记录根据条件多表插入
DROP TABLE t_ia_src;
CREATE TABLE t_ia_src AS SELECT ‘a‘||ROWNUMc1, ‘b‘||ROWNUM c2 FROM dual CONNECT
BY ROWNUM<=5;
DROP TABLE t_ia_dest_1;
CREATE TABLE t_ia_dest_1(flag VARCHAR2(10) , cVARCHAR2(10));
DROP TABLE t_ia_dest_2;
CREATE TABLE t_ia_dest_2(flag VARCHAR2(10) , cVARCHAR2(10));
DROP TABLE t_ia_dest_3;
CREATE TABLE t_ia_dest_3(flag VARCHAR2(10) , cVARCHAR2(10));
SELECT * FROM t_ia_src;
SELECT * FROM t_ia_dest_1;
SELECT * FROM t_ia_dest_2;
SELECT * FROM t_ia_dest_3;
INSERT ALL
WHEN (c1 IN (‘a1‘,‘a3‘)) THEN
INTO t_ia_dest_1(flag,c) VALUES(flag1,c2)
WHEN (c1 IN (‘a2‘,‘a4‘)) THEN
INTO t_ia_dest_2(flag,c) VALUES(flag2,c2)
ELSE
INTO t_ia_dest_3(flag,c) VALUES(flag1||flag2,c1||c2)
SELECT c1,c2, ‘f1‘ flag1, ‘f2‘ flag2 FROM t_ia_src;