例子:
alter table T_S_TRAN_PARAM modify tran_desc varchar2(25)
create table T_S_TRAN_PARAM
(
tran_id VARCHAR2(6) not null,
channel_id VARCHAR2(3),
tran_name VARCHAR2(20),
tran_desc VARCHAR2(30)
)
https://www.cnblogs.com/sujulin/p/9021355.html 相关链接
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