oracle插入查询带小数点的数字

SQL> create table aa(id number(20,10)); Table created. SQL> insert into aa values(27618522.260094); 1 row created. SQL> commit; Commit complete. SQL> select id from aa;         ID ---------- 27618522.3 SQL> select to_char(id,'999999999.9999999') from aa; TO_CHAR(ID,'999999 ------------------   27618522.2600940