방법1.
create table emp2 as select distinct * from emp;
drop table emp;
rename emp2 to emp;
방법2. //자료가 많을땐 시간이 좀걸리죠.
delete from emp a
where rowid > (select min(rowid) from emp b
where b.empno = a.empno);
방법3 //가장 좋은 방법이다.
delete from emp a, emp b
where a.rowid <> b.rowid
and a.empno = b.empno;
create table emp2 as select distinct * from emp;
drop table emp;
rename emp2 to emp;
방법2. //자료가 많을땐 시간이 좀걸리죠.
delete from emp a
where rowid > (select min(rowid) from emp b
where b.empno = a.empno);
방법3 //가장 좋은 방법이다.
delete from emp a, emp b
where a.rowid <> b.rowid
and a.empno = b.empno;
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52 | ![]() ![]() | 01-31 | 1737 | |
51 | ![]() ![]() | 01-31 | 2509 | |
50 | ![]() ![]() | 01-31 | 1386 | |
49 | ![]() ![]() | 01-19 | 1685 | |
48 | ![]() ![]() | 01-11 | 1569 | |
47 | ![]() ![]() | 01-03 | 2072 | |
46 | ![]() ![]() | 12-27 | 2505 | |
45 | ![]() ![]() | 12-19 | 1802 | |
44 | ![]() ![]() | 12-14 | 1776 | |
43 | ![]() ![]() | 12-11 | 1844 | |
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41 | ![]() ![]() | 12-01 | 1669 | |
40 | ![]() ![]() | 12-01 | 1842 | |
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