大约有 16,400 项符合查询结果(耗时:0.0238秒) [XML]
Get DateTime.Now with milliseconds precision
How can I exactly construct a time stamp of actual time with milliseconds precision?
11 Answers
...
What is cardinality in MySQL?
What is cardinality in MySQL? Please explain in simple, non-technical language.
8 Answers
...
How to reset AUTO_INCREMENT in MySQL?
How can I reset the AUTO_INCREMENT of a field?
I want it to start counting from 1 again.
24 Answers
...
How to get memory available or used in C#
How can I get the available RAM or memory used by the application?
6 Answers
6
...
Removing multiple files from a Git repo that have already been deleted from disk
I have a Git repo that I have deleted four files from using rm ( not git rm ), and my Git status looks like this:
29 An...
IOS: create a UIImage or UIImageView with rounded corners
Is it possible create an UIImage or an UIImageView with rounded corners? Because I want take an UIImage and show it inside an UIImageView , but I don't know how to do it.
...
How to “grep” for a filename instead of the contents of a file?
grep is used to search within a file to see if any line matches a given regular expression. However, I have this situation - I want to write a regular expression that will match the filename itself (and not the contents of the file). I will run this from the system's root directory, to find all thos...
Viewing contents of a .jar file
What would be the easiest way to view classes, methods, properties, etc. inside a jar file?
I'm looking for something equivalent to the very useful Lutz Roeder .NET Reflector - for Java
...
Disable a group of tests in rspec?
...3 you can:
before { skip }
# or
xdescribe
# or
xcontext
You can add a message with skip that will show up in the output:
before { skip("Awaiting a fix in the gem") }
with RSpec 2:
before { pending }
share
...
How to do 3 table JOIN in UPDATE query?
...
UPDATE TABLE_A a
JOIN TABLE_B b ON a.join_col = b.join_col AND a.column_a = b.column_b
JOIN TABLE_C c ON [condition]
SET a.column_c = a.column_c + 1
EDIT:
For general Update join :
UPDATE TABLEA a
JOIN TABLEB b ON a.join_colA = b.join_colB
SET a.columnToUpdate = [something...
