一、如果两张表有主键关系的话:执行更新UPDATE (SELECT tt1.col1 ,tt2.cola,tt1.id,tt2.id FROM tt1,tt2 WHERE tt1.ID=tt2.ID) SET col1=cola; 报错:ORA-01779: 无法修改与非键值保存表对应的列分析根.....
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其他好文 时间:
2014-06-28 18:48:26
阅读次数:
258
题目:Convert Sorted Array to Binary Search TreeGiven an array where elements are sorted in ascending order, convert it to a height balanced BST.个人思路:1、选...
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其他好文 时间:
2014-06-21 06:37:00
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183
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.说明:平衡二叉搜索树,即任何结点的左子树和右子树高度最多相差1的二叉搜索树。二叉搜索树:二叉查找树(Bin...
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其他好文 时间:
2014-06-21 00:47:08
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221
Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T.The same repeate...
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其他好文 时间:
2014-06-20 23:37:29
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195
查询表字段 pingid = (1,2,3,)用正则select * from linkinfo where pingid regexp '[[::]]'用FIND_IN_SET()SELECT * FROM linkinfo WHERE FIND_IN_SET( '1', pingid )原来以为...
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其他好文 时间:
2014-06-20 22:34:52
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254
--ORA-00054:资源正忙,要求指定NOWAIT----以DBA角色, 查看当前数据库里锁的情况可以用如下SQL语句--SELECT sid, serial#, username, osuser FROM v$session WHERE sid IN(SELECT session_id FRO...
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其他好文 时间:
2014-06-20 17:26:13
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222
Every now and then, I come across various newbies Java developers who are found to get stuck with some of the following common exceptions where I need...
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编程语言 时间:
2014-06-20 17:19:52
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325
--锁表查询SQLSELECT object_name, machine, s.sid, s.serial# FROM gv$locked_object l, dba_objects o, gv$session s WHERE l.object_id = o.object_id AND l.sess...
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其他好文 时间:
2014-06-20 15:36:49
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201
There areNgas stations along a circular route, where the amount of gas at stationiisgas[i].You have a car with an unlimited gas tank and it costscost[...
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其他好文 时间:
2014-06-20 15:20:38
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176
mysql修改最后一条记录&删除第一条记录 收藏 //修改最后一条记录UPDATE userinfo set userid='55' WHERE 1 ORDER BY userid DESC LIMIT 1//删除第一条记录delete from userinfo where 1 order by ...
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数据库 时间:
2014-06-20 14:50:07
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305