oracle怎么修改主键索引,oracle的常用sql 表的新增，修改，唯一，索引，主键，备注...

1.创建表

create table APP21

(

id         VARCHAR2(20) not null,

aae036     DATE,

nums       NUMBER(14),

sjzt       VARCHAR2(6) default '0' not null,

time       DATE default sysdate not null

)

2.分配表空间

tablespace DATA

pctfree 10

initrans 1

maxtrans 255

storage

(

initial 64K

minextents 1

maxextents unlimited

);

3添加备注给表字段

comment on table APP21

is '医保APP订单查询主表';

4.建索引

create index N_APP21_1 on APP21 (AKB020)

tablespace DATA

pctfree 10

initrans 2

maxtrans 255;

5.eate/Recreate primary, unique and foreign key constraints

alter table APP21

add constraint PK_APP21 primary key (ID)

using index

tablespace DATA

pctfree 10

initrans 2

maxtrans 255;

alter table APP21

add constraint U_APP21_1 unique (HISORDERID)

using index

tablespace DATA

pctfree 10

initrans 2

maxtrans 255;

6.表字段，并添加备注

alter table app21

add jylsh varchar2(2000);

comment on column app21.jylsh is '交易流水号';

commit;

标签：pctfree,APP21,tablespace,sql,oracle,table,DATA,主键,255

来源： https://blog.csdn.net/m0_37735354/article/details/100998577