Top条数Select * FROM Table Where ROWNUM<=2 order by AgeUnitNo descROWNUM<=2 代表查询两条数据。Date日期to_date() 代表转换位Oracle能够识别的Update talbe set A1 = to_date('" + ...
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数据库 时间:
2014-07-22 22:55:16
阅读次数:
246
http://www.cnblogs.com/suihui/archive/2013/08/01/3229821.html一、查①select($where = '', $data = '*', $limit = '', $order = '', $group = '', $key='')/** ....
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数据库 时间:
2014-07-18 23:21:48
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323
用oracle账号登陆ORACLE数据库服务器
方法一:
查看表空间的名字及文件所在位置:
select tablespace_name, file_id, file_name,round(bytes/(1024*1024),0) total_space
from dba_data_files order by tablespace_name;
修改数据库dat...
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数据库 时间:
2014-07-18 22:24:47
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435
Given a binary tree, return thebottom-up level ordertraversal of its nodes' values. (ie, from left to right, level by level from leaf to root).For exa...
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其他好文 时间:
2014-07-18 20:06:13
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255
Since no order requirement, we can simply swap the target value to the last non-target-value in the array - if the last non-target-value is not behind...
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其他好文 时间:
2014-07-18 17:36:41
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192
sharepoint admin svc must be running in order to create deployment timer job 若要创建计时器作业,必须运行SVC...
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其他好文 时间:
2014-07-18 11:19:35
阅读次数:
197
1 --查找bad sql的方法: 2 3 select * from (select buffer_gets, sql_text 4 5 from v$sqlarea 6 7 where buffer_gets >500000 8 9 order by buff...
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数据库 时间:
2014-07-18 08:29:41
阅读次数:
252
原帖地址:http://www.cnblogs.com/yunfeifei/p/3850440.html#undefined1.对查询进行优化,要尽量避免全表扫描,首先应考虑在 where 及 order by 涉及的列上建立索引。2.应尽量避免在 where 子句中对字段进行 null 值判断,否...
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数据库 时间:
2014-07-17 18:17:16
阅读次数:
338
获取表字段: select * from user_tab_columns where Table_Name='用户表' order by column_name 获取表注释: select * from user_tab_comments where Table_Na...
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数据库 时间:
2014-07-17 13:34:00
阅读次数:
240
Given a string containing just the characters '(', ')', '{', '}', '[' and ']',
determine if the input string is valid.
The brackets must close in the correct order, "()" and "()[]{}" are
all va...
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其他好文 时间:
2014-07-17 10:18:17
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181