oracle修改序列自增值alter sequence increment by

2020-04-24

序列值比表中最大值小，导致新插入id重复，比如数据库中100，seq.nextval值为100，思路是将自增值设置为800.执行一次让两个值相等。

1、alter sequence t1_ID_SEQ increment by 520;

2、SQL> select t1_ID_SEQ.nextval from dual;

SQL> select max(id) from t1;

3、SQL> alter sequence t1_ID_SEQ increment by 520;

SQL> select t1_ID_SEQ.nextval from dual;

NEXTVAL

----------

87743

4、SQL> Alter sequence t1_ID_SEQ Increment By 1;

Sequence altered.

SQL> select t1_ID_SEQ.nextval from dual;

NEXTVAL

----------

87744

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