Convert data from table1 to another table

Question

table1 is the source table, i want to create a command button to generate a query, convert and separate the data into table2
here are the conditions:
1. only data contains "MMHK" in either 1stdest or 2nddest fields
2. if 1stdest contains "MMHK", insert only 1sttime into table2, insert the code "L" into the field "code" in table2
3. if 2nddest contains "MMHK", insert only 2ndtime into table2, insert the code "R" into the field "code" in table2
4. if 1stdest and 2nddest has no "MMHK", do not insert anything
table1
transno 1stdest 2nddest 1sttime 2ndtime
===== ===== ====== ===== ======
B1234 ACCY MMHK 1530 0040
C9384 GBCY KOWL 0420 1230
P0923 MMHK LOWL 0730 2120
L0932 MMHK CYLW 1300 1700
E0930 EGLL MMHK 1500 2203
Q9827 MMHK QOWL 0412 1217
Z8393 OLWO LXPS 0914 1423
C0920 SOWL MMHK 1725 0617
table2
transno 1stdest 2nddest time code
===== ====== ====== === ====
B1234 ACCY MMHK 0040 R
P0923 MMHK LOWL 0730 L
L0932 MMHK CYLW 1300 L
E0930 EGLL MMHK 2203 R
Q9827 MMHK QOWL 0412 L
C0920 SOWL MMHK 0617 R
thanks.

Answer 1

Hallo,
first of all , you used wrong column names - they cannot start with number.
create table scott.table1
(transno VARCHAR2(5),
c1stdest VARCHAR2(4),
c2nddest VARCHAR2(4),
c1sttime VARCHAR2(4),
c2ndtime VARCHAR2(4))
insert into scott.table1
(select 'B1234', 'ACCY', 'MMHK', '1530', '0040'
  from dual
  UNION ALL
  select 'C9384', 'GBCY', 'KOWL', '0420', '1230'
  from dual
  UNION ALL
  select 'P9023', 'MMHK', 'LOWL', '0730', '2120'
  from dual
  UNION ALL
  select 'L0932', 'MMHK', 'CYLW', '1300', '1700'
  from dual
  UNION ALL
  select 'E0930', 'EGLL', 'MMHK', '1500', '2203'
  from dual
create table scott.table2
(transno VARCHAR2(5),
c1stdest VARCHAR2(4),
c2nddest VARCHAR2(4),
time VARCHAR2(4),
code VARCHAR2(1))
insert into scott.table2 (transno,c1stdest, c2nddest, time, code)
select transno,c1stdest, c2nddest, CASE WHEN c1stdest = 'MMHK' THEN c1sttime ELSE c2ndtime END,
                                   CASE WHEN c1stdest = 'MMHK' THEN 'L' ELSE 'R' END
from scott.table1
where c1stdest = 'MMHK' or c2nddest = 'MMHK'
select * from scott.table2
TRANSNO      C1stdest  c2nddest   time        code
B1234          ACCY           MMHK          0040           R
P9023          MMHK            LOWL           0730           L
L0932          MMHK          CYLW           1300           L
E0930          EGLL           MMHK          2203           RRegards
Dmytro