大约有 30,000 项符合查询结果（耗时：0.0440秒） [XML]
MySQL ON DUPLICATE KEY - last insert id?
...e.html
At the bottom of the page they explain how you can make LAST_INSERT_ID meaningful for updates by passing an expression to that MySQL function.
From the MySQL documentation example:
If a table contains an AUTO_INCREMENT column and INSERT ... UPDATE inserts a row, the LAST_INSERT_ID() func...
How does “do something OR DIE()” work in PHP?
...
This is called short-circuit evaluation and is useful in languages other than PHP as well.
– Mr Griever
Feb 8 '11 at 23:25
...
Minimal web server using netcat
... trying to set up a minimal web server using netcat (nc). When the browser calls up localhost:1500, for instance, it should show the result of a function ( date in the example below, but eventually it'll be a python or c program that yields some data).
My little netcat web server needs to be a whil...
How to get cumulative sum
...
select t1.id, t1.SomeNumt, SUM(t2.SomeNumt) as sum
from @t t1
inner join @t t2 on t1.id >= t2.id
group by t1.id, t1.SomeNumt
order by t1.id
SQL Fiddle example
Output
| ID | SOMENUMT | SUM |
-----------------------
| 1 | 1...
nodejs require inside TypeScript file
...t of default definitions for window, document and such specified in a file called lib.d.ts. If I do a grep for require in this file I can find no definition of a function require. Hence, we have to tell the compiler ourselves that this function will exist at runtime using the declare syntax:
declar...
How to restore to a different database in sql server?
...empCopy with the contents of your.bak.
Example (restores a backup of a db called 'creditline' to 'MyTempCopy';
RESTORE FILELISTONLY FROM DISK='e:\mssql\backup\creditline.bak'
>LogicalName
>--------------
>CreditLine
>CreditLine_log
RESTORE DATABASE MyTempCopy FROM DISK='e:\mssql\back...
Output of git branch in tree like fashion
...enclosed-message-display-tweaks merged in
(x) experiment merged in (only locally)
NOTE: working directory contains modified files
git-wtf shows you:
How your branch relates to the remote repo, if it's a tracking branch.
How your branch relates to non-feature ("version") branches, if ...
Efficiently convert rows to columns in sql server
... from yourtable
group by ColumnName, id
order by id
FOR XML PATH(''), TYPE
).value('.', 'NVARCHAR(MAX)')
,1,1,'')
set @query = N'SELECT ' + @cols + N' from
(
select value, Column...
Django: multiple models in one template using forms [closed]
...
note that, with the way you do it, the .is_valid() call is not short circuited. If you want to short circuit it, you'll need to delay calling the .is_valid() function until the 'and'.
– Lie Ryan
Mar 1 '12 at 5:37
...
C++ auto keyword. Why is it magic?
...ifies that the type of the variable that is being declared will be automatically deduced from its initializer. For functions, specifies that the return type is a trailing return type or will be deduced from its return statements (since C++14).
Syntax
auto variable initializer (1) (since C++11)
...