大约有 40,000 项符合查询结果（耗时：0.0493秒） [XML]
generate days from date range
...) + (100 * c.a) + (1000 * d.a) ) DAY as Date
from (select 0 as a union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9) as a
cross join (select 0 as a union all select 1 union...
Max return value if empty query
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int maxShoeSize = Workers.Where(x => x.CompanyId == 8)
.Select(x => x.ShoeSize)
.DefaultIfEmpty(0)
.Max();
The zero in DefaultIfEmpty is not necessa...
IE8 issue with Twitter Bootstrap 3
...g a site using the new Twitter Bootstrap. The site looks fine and works in all required browsers except IE8.
22 Answers
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How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
What is the proper way to get a list of all available serial ports/devices on a Linux system?
12 Answers
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Select something that has more/less than x character
...e LENGTH function to the EmployeeName column). In Oracle, and probably in all other RDBMSs, this means that a regular index on EmployeeName will be useless to answer this query; the database will do a full table scan, which can be really costly.
However, various databases offer a function indexes ...
The selected run destination is not valid for this action
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I had that issue several times. Basically, just set the Base SDK in Build Settings to Latest OS X and it should work properly.
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What is causing “Unable to allocate memory for pool” in PHP?
I've occasionally run up against a server's memory allocation limit, particularly with a bloated application like Wordpress, but never encountered "Unable to allocate memory for pool" and having trouble tracking down any information.
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Mercurial for Beginners: The Definitive Practical Guide
...configure it to ignore files?
Ignore is configured in a normal text file called .hgignore in the root of your repository. Add it just like a normal file with:
hg add .hgignore
There are two syntax options available for file matching, glob and regexp. glob is unix-like filename expansion and rege...
How to convert hex to rgb using Java?
... must be * 255 / 16. I tested this with "000", "aaa", and "fff", and they all work properly now.
– Andrew
Apr 14 '16 at 16:04
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Python syntax for “if a or b or c but not all of them”
...three command line arguments. (Either it runs on default behavior or needs all three values specified.)
15 Answers
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