大约有 47,000 项符合查询结果（耗时：0.0451秒） [XML]
解决：ORA-00054:资源正忙,要求指定NOWAIT - 数据库(内核) - 清泛网 - 专注...
...删除
1：找出所有被锁的对象，定位出哪个回话占用
select l.session_id,o.owner,o.object_name from v$locked_object l,dba_objects o where l.object_id=o.object_id
结果：
session_id owner object_name
158 SA TEST_1
...
对比想要创建的索引，定位哪些会话需要...
UIButton Long Press Event
...gPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
[self.button addGestureRecognizer:longPress];
[longPress release];
And then implement the method that handles the gesture
- (void)longPress:(UILongPressGestureRecognizer*)gesture {
if ( gesture.s...
How to use sidebar with the keyboard in Sublime Text 2 and 3?
... Ctrl+0 (Ctrl+Zero) to focus on the side bar.
Then you'll be able to move selection among files with arrow keys and to open the selected file hitting Enter, without touching the mouse.
share
|
impr...
How to enter a multi-line command
...e grave accent (backtick):
Get-ChildItem -Recurse `
-Filter *.jpg `
| Select LastWriteTime
However, this is only ever necessary in such cases as shown above. Usually you get automatic line continuation when a command cannot syntactically be complete at that point. This includes starting a new...
How do I get the MIN() of two fields in Postgres?
...
LEAST(a, b):
The GREATEST and LEAST functions select the largest or smallest value from a list of any number of expressions. The expressions must all be convertible to a common data type, which will be the type of the result (see Section 10.5 for details). NULL values in...
Addressing localhost from a VirtualBox virtual machine [closed]
...-> Network -> Host-only Networks -> click the "+" icon. Click OK.
Select your box and click the "Settings" icon -> Network -> Adapter 2 -> On the "Attached to:" dropdown, select "Host-only Adapter" and your network (vboxnet0) should show up below by default. Click OK.
Once you star...
Multiple Indexes vs Multi-Column Indexes
...e multi-column index can be used for queries referencing all the columns:
SELECT *
FROM TableName
WHERE Column1=1 AND Column2=2 AND Column3=3
This can be looked up directly using the multi-column index. On the other hand, at most one of the single-column index can be used (it would have to look u...
Disable validation of HTML5 form elements
...ecause it should absolutely work without JavaScript.
In my case, I put a select element with 2 options (http:// or https://) before the URL input because I just need websites (and no ftp:// or other things). This way I avoid typing this weird prefix (the biggest regret of Tim Berners-Lee and maybe...
How to specify different Debug/Release output directories in QMake .pro file
...
This one worked better than the selected answer. The selected one works, but if both debug and release are configured, the second block of settings remains.
– Paulo Carvalho
Jan 23 '18 at 16:59
...
CListCtrl 行高设置，自定义行高 - C/C++ - 清泛网 - 专注C/C++及内核技术
...mask = LVIF_STATE;//|LVIF_IMAGE;
lvi.stateMask = LVIS_FOCUSED | LVIS_SELECTED ;
lvi.iItem = lpMeasureItemStruct->itemID;
BOOL bGet = GetItem(&lvi);
//高亮显示
BOOL bHighlight =((lvi.state & LVIS_DROPHILITED)||((lvi.state & LVIS_SELECTED) &&
((GetFocus() == ...