1、增加表字段:alter table collect_image_url add id number(19) not null
2、删除表字段：alter table collect_image_url drop column sd
3、插入数据：insert into flfg(bh,mc,lj,fl) values(14,'sdj,'/mit-web/jccjbk/dgmbacz.html','gzczgf')；
4、通过dblink取别的表中的数据更新 ：update center t set t.code = (select j.code from border@center_db_link j where j.name = t.dw and rownum = 1)
5、创建dblink：create public database link DB_LINK
connect to DB1 identified by DB1
using '(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.56.36)(PORT=1521)))(CONNECT_DATA=(SERVICE_NAME=DSDB)))';
6、通过dblink创建视图:create or replace view v_db as select * from DB1.JSK@DB1;
7、创建表:create table disposeresult（id number(16),sjdbh1 varchar2(50),cjdbh2 varchar2(50),zldbh3 varchar2(50),czfs4 varchar2(50)，
xccztype5 varchar2(50),nbyj6 varchar2(50),qtcontent7 varchar2(2048),tjcontent8 varchar2(2048),tjresult9 varchar2(50));
8、更新数据update border t set t.type = '2' where t.name = 'skjsa'
9、带有条件的插入数据：update border t set t.type = '2' where t.name = '的啥叫'
10、创建SEQUENCE
CREATE SEQUENCE SEQ_SJDSJJJ
START WITH 1//id以多少开始
MAXVALUE 999999999999999999999999999//最大值
MINVALUE 1//最小值
increment by 1//增量
CACHE 20//高速缓存
11、删除某个表：delete from 表名称
12、带有条件的插入数据：insert into center (id) (select y.type from border y where y.name ='测试')