大约有 47,000 项符合查询结果（耗时：0.0651秒） [XML]
What's the best way of structuring data on firebase?
...data and a SQL environment is querying data. There's no simple way to say "SELECT USERS WHERE X = Y", because of the real-time nature of the data (it's constantly changing, sharding, reconciling, etc, which requires a simpler internal model to keep the synchronized clients in check)
A simple exampl...
What is a PDB file?
...want it to not be generated at all, go to your project's Build properties, select the Release configuration, click on "Advanced..." and under "Debug Info" pick "None".
share
|
improve this answer
...
How do DATETIME values work in SQLite?
...
select * from table where creation between a and b;
– koem
Jun 21 '13 at 4:07
add a comment
...
Multiple inputs with same name through POST in php
...ted it up. You didn't explain much about it though, which is why I didn't select it as the answer to my question. This helps me a ton, as I've been trying to figure this one out for a while (as you may notice in one of my previous questions). My previous approach was to simply add all of the inpu...
Why do some functions have underscores “__” before and after the function name?
...ml",
title = _("Title"),
data = self.application.db.query("select ... where object_id=%s", self.object_id)
)
...
share
|
improve this answer
|
follow
...
How can I change my Cygwin home folder after installation?
...nced >> Environment Variables >> User Variables for >> [select variable HOME] >> edit
share
|
improve this answer
|
follow
|
...
Why doesn't Dijkstra's algorithm work for negative weight edges?
... the "closed" nodes is indeed minimal, and thus the node that will next be selected is also minimal.
The idea of it is: If we have a vertex in open such that its cost is minimal - by adding any positive number to any vertex - the minimality will never change.
Without the constraint on positive numb...
How to get a pixel's x,y coordinate color from an image?
Is there any way to check if a selected(x,y) point of a PNG image is transparent?
4 Answers
...
Differences between action and actionListener
...not really useful on command components. They are more useful on input and select components <h:inputXxx>/<h:selectXxx>. In command components, just stick to action and/or actionListener for clarity and better self-documenting code. Moreover, like actionListener, the f:ajax listener does...
Which is more efficient: Multiple MySQL tables or one large table?
...ectly then you should only need the intense lookup by doing something like select * from users where name="bob". Once you have bob then you are using an index to find the joined tables to bob which is significantly faster because you are using bob's id. This happens regardless of if you are doing a ...