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我有以下表和數據,我想合併一列中的loc1和loc2,並刪除loc列中的重複值,然後根據group_no列對其進行分組。合併兩列然後組合
drop table test;
create table test (loc1 number(9), loc2 number(9), group_no number(9));
insert into test values(2,3,1);
insert into test values(2,9,1);
insert into test values(4,3,1);
insert into test values(6,8,2);
insert into test values(11,7,2);
insert into test values(20,15,2);
insert into test values(15,14,2);
insert into test values(21,31,3);
insert into test values(31,32,3);
預期的結果是:
loc group_no
2 1
3 1
9 1
4 1
6 2
8 2
11 2
20 2
15 2
21 3
31 3
32 3
問候
您能展示預期的結果嗎? –