大约有 43,000 项符合查询结果（耗时：0.0790秒） [XML]
MySQL, better to insert NULL or empty string?
...tching databases, is that Oracle does not support empty strings. They are converted to NULL automatically and you can't query for them using clauses like WHERE somefield = '' .
share
|
improve this...
Simple state machine example in C#?
...mand, End Command, Pause Command, Resume Command, Exit Command).
You can convert this to C# in a handful of ways, such as performing a switch statement on the current state and command, or looking up transitions in a transition table. For this simple state machine, I prefer a transition table, whi...
How to convert an entire MySQL database characterset and collation to UTF-8?
How can I convert entire MySQL database character-set to UTF-8 and collation to UTF-8?
19 Answers
...
Is std::vector copying the objects with a push_back?
... instead of a copy if the argument is an rvalue reference. (Objects can be converted to rvalue references with std::move().)
– emlai
Aug 7 '15 at 17:12
...
Writing a dict to txt file and reading it back?
... values. Note that in this case my dict contains integers so that's why it converts to int. This is most likely the part you need to change for your situation.
def readDict(filename, sep):
with open(filename, "r") as f:
dict = {}
for line in f:
values = line.split(se...
GPU Emulator for CUDA programming without the hardware [closed]
...h is a true emulator in the sense that PTX (bytecode in which CUDA code is converted to) will be emulated.
There's also an LLVM translator, it would be interesting to test if it's more fast than when using -deviceemu.
share...
How to get a date in YYYY-MM-DD format from a TSQL datetime field?
... there a simple way to perform this in SQL Server or would it be easier to convert it programmatically after I retrieve the result set?
...
Ignoring time zones altogether in Rails and PostgreSQL
...
All timezone-aware dates and times are stored internally in UTC. They
are converted to local time in the zone specified by the TimeZone
configuration parameter before being displayed to the client.
Example (in psql):
db=# SELECT timestamptz '2012-03-05 20:00+03';
timestamptz
----------------...
Should you choose the MONEY or DECIMAL(x,y) datatypes in SQL Server?
...
As someone currently converting a SQL Server database to Amazon Redshift, I can vouch that this is a genuine issue. Try to avoid data types that are bespoke to a particular database platform unless there are very sound business reasons to use the...
Undefined reference to static constexpr char[]
...h says :
A glvalue (3.10) of a non-function, non-array type T can be
converted to a prvalue.53 [...]
What is applied in the array-to-pointer conversion.
This wording of [basic.def.odr] was changed due to Defect Report 712 since some cases were not covered by this wording but these changes d...