大约有 45,000 项符合查询结果（耗时：0.0354秒） [XML]
How to debug PDO database queries?
...ated SQL queries in PHP by concatenating strings. If I got database syntax error, I could just echo the final SQL query string, try it myself on the database, and tweak it until I fixed the error, then put that back into the code.
...
Adding external library into Qt Creator project
...
The error you mean is due to missing additional include path.
Try adding it with:
INCLUDEPATH += C:\path\to\include\files\
Hope it works.
Regards.
share
...
How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...ch other; one of them successfully INSERTs; the other gets a duplicate key error and does an UPDATE instead. The UPDATE blocks waiting for the INSERT to rollback or commit. When it rolls back, the UPDATE condition re-check matches zero rows, so even though the UPDATE commits it hasn't actually done ...
Is #pragma once a safe include guard?
... on using #pragma once as opposed to include guards is to avoid copy/paste errors.
Let's face it: most of us hardly start a new header file from scratch, but rather just copy an existing one and modify it to our needs. It is much easier to create a working template using #pragma once instead of inc...
Why is using a wild card with a Java import statement bad?
...happen. The compiler notices that there are two Event classes and gives an error.
– jan.vdbergh
Sep 29 '08 at 5:52
45
...
HttpListener Access Denied
...ash if "MyUri" is empty, otherwise you'll get a The parameter is incorrect error. Example: url=http://+:80/
– Igor Brejc
May 16 '13 at 17:53
15
...
Check if list is empty in C# [closed]
I have a list of objects populated from a database. I need to display an error message if the list is empty and display a grid view otherwise.
...
How to concatenate strings of a string field in a PostgreSQL 'group by' query?
... ') AS semi_colon_separated_names FROM things;
But this will be a syntax error:
SELECT string_agg(name, '; ' ORDER BY name) AS semi_colon_separated_names FROM things;
--> ERROR: syntax error at or near "ORDER"
Tested on PostgreSQL 8.3.
CREATE FUNCTION string_agg_transfn(text, text, text)
...
Selecting text in an element (akin to highlighting with your mouse)
...
jQuery solution gives me Uncaught TypeError: Cannot read property 'msie' of undefined
– egmfrs
May 28 at 19:41
...
Do I need to explicitly call the base virtual destructor?
...s question might be related and help questions/15265106/c-a-missing-vtable-error.
– Paul-Sebastian Manole
Dec 20 '14 at 20:16
...