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--1. È¡Ç°10ÐÐ
select * from hr.employees where rownum<=10
--2. °´ÕÕfirst_nameÉýÐò£¬È¡Ç°10λ
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--> SORT ORDER BY STOPKEY Ö»ÅÅÐòÇ°10ÐУ¬×÷Ϊһ¸ö¾ØÕó½á¹¹
-->ʣϵÄÐÐÓëµÚ10ÐнøÐбȽϣ¬ºÏÊʵĽøÈë¾ØÕó,·ñÔòÅ×Æú
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select rownum,t.* from (select rownum,employees.* from hr.employees order by first_name) t where rownum<=10
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SELECT STATEMENT, GOAL = CHOOSE Cost=5 Cardinality=10 Bytes=15622
COUNT STOPKEY
VIEW Object owner=SCOTT  
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CREATE DATABASE Db_test
ON
( NAME = Db_test_DATA,
FILENAME = 'c:\Db_test.mdf' )
LOG ON
( NAME = Db_test_LOG,
FILENAME = 'c:\Db_test.ldf')
GO
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public void test1()
{
try
{
Connection con = DBUtils.getConn();
String sql="backup database tdzl to disk='d:\\tdzl.bak'";
Statement st = con.c ......
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[Oracle]¸ßЧµÄSQLÓï¾äÖ®·ÖÎöº¯Êý(Ò»)--sum()
[Oracle]¸ßЧµÄSQLÓï¾äÖ®·ÖÎöº¯Êý(¶þ)--max()
[Oracle]¸ßЧµÄSQLÓï¾äÖ®·ÖÎöº¯Êý(Èý)--row_number() /rank()/dense_rank()
[Oracle]¸ßЧµÄSQLÓï¾äÖ®·ÖÎöº¯Êý(ËÄ)--lag()/lead()
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