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Oracle Differences between NVL and Coalesce
...om dual; would work as NVL will do an implicit conversion of numeric 10 to string.
select coalesce('abc',10) from dual; will fail with Error - inconsistent datatypes: expected CHAR got NUMBER
Example for UNION use-case
SELECT COALESCE(a, sysdate)
from (select null as a from dual
union
...
How to declare variable and use it in the same Oracle SQL script?
...
Is it possible to concatenate variables+strings?
– Ecropolis
Jun 18 '14 at 15:01
@E...
How do I execute a string containing Python code in Python?
How do I execute a string containing Python code in Python?
14 Answers
14
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Are there any downsides to passing structs by value in C, rather than passing a pointer?
...e output parameters be listed first before input parameters, e.g. int func(char* out, char *in);
– zooropa
Apr 29 '09 at 12:29
...
Log all requests from the python-requests module
...m:
requests no
http.client.HTTPConnection no
urllib3 yes
Sure, you can extract debug messages from HTTPConnection by setting:
HTTPConnection.debuglevel = 1
but these outputs are merely emitted via the print statement. To prove this, simply grep the Python 3.7 client.py source code and view th...
In Java, what is the best way to determine the size of an object?
...te static Instrumentation instrumentation;
public static void premain(String args, Instrumentation inst) {
instrumentation = inst;
}
public static long getObjectSize(Object o) {
return instrumentation.getObjectSize(o);
}
}
Add the following to your MANIFEST.MF:
P...
How to select between brackets (or quotes or …) in Vim?
...
This is a highly useful tip. No more fumbling with extra keystrokes. Thank you for the link.
– Rai
Jan 18 '15 at 15:36
add a comment
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Is a Java string really immutable?
We all know that String is immutable in Java, but check the following code:
15 Answers
...
What is the default initialization of an array in Java?
...
What about a String array?
– Zac
Dec 23 '17 at 7:05
1
...
How to get the full path of running process?
...rocess = Process.GetCurrentProcess(); // Or whatever method you are using
string fullPath = process.MainModule.FileName;
//fullPath has the path to exe.
There is one catch with this API, if you are running this code in 32 bit application, you'll not be able to access 64-bit application paths, so...