大约有 43,000 项符合查询结果(耗时:0.0370秒) [XML]
MySQL: Invalid use of group function
...!= b.sid
GROUP BY a.pid
Which I believe should return only rows where at least two rows exist with the same pid but there is are at least 2 sids. To make sure you get back only one row per pid I've applied a grouping clause.
...
How to set the font style to bold, italic and underlined in an Android TextView?
...
I checked it in 2.1. So at least it should work from 2.1 and above
– Andro Selva
Oct 14 '12 at 2:03
1
...
What does JVM flag CMSClassUnloadingEnabled actually do?
...fact, this is what happens when you do a hot redeploy of a webapp. (Or at least, that's what should happen, if you can avoid the problems that lead to a permgen storage leak.)
share
|
improve this ...
How to concatenate strings of a string field in a PostgreSQL 'group by' query?
...
How about using Postgres built-in array functions? At least on 8.4 this works out of the box:
SELECT company_id, array_to_string(array_agg(employee), ',')
FROM mytable
GROUP BY company_id;
share
...
What platforms have something other than 8-bit char?
...ovide one, instead of silently using a size you didn't expect. At the very least, if I hit a case where I had a good reason to assume it, then I'd assert it.
share
|
improve this answer
|
...
What is a “batch”, and why is GO used?
...rop a table and re-create the same-named table in a single transaction, at least in Sybase (ditto for creating procedures/triggers):
> drop table tempdb.guest.x1
> create table tempdb.guest.x1 (a int)
> go
Msg 2714, Level 16, State 1
Server 'SYBDEV', Line 2
There is alrea...
Ignore with CSS?
...P). And the answer to this is, that it is not possible with <br>, at least not cross-browser. So I showed an alternative.
– Netsurfer
Feb 8 '14 at 14:22
2
...
What does $$ mean in the shell?
... file for something, you ought to be using a better language which will at least let you add the "exclusive" flag for opening (creating) the file. Then you can be sure you're not clobbering something else.
share
|
...
'Microsoft.SqlServer.Types' version 10 or higher could not be found on Azure
...
@Yovav, at least you're running in a floppy disk I don't think that 2 MB of binary data have any influence in the performance of your application. I suggest you to run a benchmark and let us know (with real data) the impact in the CPU.
...
RegEx to parse or validate Base64 data
... or is not base64, chances are you are not interested in empty strings. At least i know i am not.
– njzk2
Aug 22 '11 at 13:19
4
...