Oracle¸ß¼¶²éѯ
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1. Ê÷²éѯ
create table tree (
id number(10) not null primary key,
name varchar2(100) not null,
super number(10) not null // 0 is root
);
-- ´Ó×Óµ½¸¸
select * from tree start with id = ? connect by id = prior super
-- ´Ó¸¸µ½×Ó
select * from tree start with id = ? connect by prior id = super
-- Õû¿ÃÊ÷
select * from tree start with super = 0 connect by prior id = super
2. ·ÖÒ³²éѯ
select * from (
select my_table.*, rownum my_rownum from (
select name, birthday from employee order by birthday
) my_table where rownum < 120
) where my_rownum >= 100;
3. ÀÛ¼Ó²éѯ, ÒÔscott.empΪÀý
select empno, ename, sal, sum(sal) over(order by empno) result from emp;
EMPNO ENAME SAL RESULT
---------- ---------- ---------- ----------
7369 SMITH 800 800
7499 ALLEN &
Ïà¹ØÎĵµ£º
ORACLE±¸·Ý²ßÂÔ(ORACLE BACKUP STRATEGY)
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$slqplus /nolog
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create tablespace james
datafile '/export/home/oracle/oradata/james.dbf'
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DECLARE
v_FirstName VARCHAR2(20);
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