[英]SQL - ORACLE change rows to column
我有桌子
1 | 2 | test,test| 4
我需要查询以这种格式返回此表:
1 | 2 | test | 4 1 | 2 | test | 4
with src as
(
select '1' col0, '2' col1, 'test1,test2' col2 from dual union all
select '11' col0, '22' col1, 'test11,test22' col2 from dual
)
, explode as
(
select col0
, col1
, regexp_substr(col2, '\w+', 1, 1) as col2_1
, regexp_substr(col2, '\w+', 1, 2) as col2_2
-- if there is more add more...
from src
)
select col0, col1, col2_1 from explode where col2_1 is not null union all
select col0, col1, col2_2 from explode where col2_2 is not null
order by col0, col1, col2_1
;
1 2 test1
1 2 test2
11 22 test11
11 22 test22
五个值的示例:
with src as
(
select '1' col0, '2' col1, 'test1,test2' col2 from dual union all
select '11' col0, '22' col1, 'test11,test22' col2 from dual union all
select '111' col0, '222' col1, 'test31,test32,test33,test34,test35' col2 from dual
)
, explode as
(
select col0
, col1
, regexp_substr(col2, '\w+', 1, 1) as col2_1
, regexp_substr(col2, '\w+', 1, 2) as col2_2
, regexp_substr(col2, '\w+', 1, 3) as col2_3
, regexp_substr(col2, '\w+', 1, 4) as col2_4
, regexp_substr(col2, '\w+', 1, 5) as col2_5
-- if there is more add more...
from src
)
select col0, col1, col2_1, col2_2, col2_3, col2_4, col2_5 from explode where col2_1 is not null union all
select col0, col1, col2_1, col2_2, col2_3, col2_4, col2_5 from explode where col2_2 is not null union all
select col0, col1, col2_1, col2_2, col2_3, col2_4, col2_5 from explode where col2_3 is not null union all
select col0, col1, col2_1, col2_2, col2_3, col2_4, col2_5 from explode where col2_4 is not null union all
select col0, col1, col2_1, col2_2, col2_3, col2_4, col2_5 from explode where col2_5 is not null
order by col0, col1, col2_1, col2_2, col2_3, col2_4, col2_4, col2_5
;
1 2 test1 test2
1 2 test1 test2
11 22 test11 test22
11 22 test11 test22
111 222 test31 test32 test33 test34 test35
111 222 test31 test32 test33 test34 test35
111 222 test31 test32 test33 test34 test35
111 222 test31 test32 test33 test34 test35
111 222 test31 test32 test33 test34 test35
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