SELECT ROWNUM rn,v.* FROM view_test v;
输出:
RN ID DEPTNO DNAME
1 1 20 RESEARCH
2 2 30 SALES
3 3 30 SALES
4 4 20 RESEARCH
5 5 30 SALES
6 6 30 SALES
7 7 10 ACCOUNTING
8 8 10 ACCOUNTING
9 9 30 SALES
10 10 30 SALES
11 11 20 RESEARCH
12 12 10 ACCOUNTING
13 13 20 RESEARCH
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