Oracle 修改表注释

/*修改原字段名name为name_tmp*/
    alter table SUIT_EXT_INFO rename column INVE_PERI to INVE_PERI_TMP;
    /*增加一个和原字段名同名的字段name*/
    alter table SUIT_EXT_INFO add INVE_PERI VARCHAR(2);
    /*将原字段name_tmp数据更新到增加的字段name*/
    update SUIT_EXT_INFO set INVE_PERI=trim(INVE_PERI_TMP);
    /*更新完，删除原字段name_tmp*/
    alter table SUIT_EXT_INFO drop column INVE_PERI_TMP;
    comment on column SUIT_EXT_INFO.INVE_PERI is '客户拟投资期限';