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What's the difference between TRUNCATE and DELETE in SQL
...to be faster than a DELETE.
Various system-specific issues have to be considered, as detailed below.
Statement type
Delete is DML, Truncate is DDL (What is DDL and DML?)
Commit and Rollback
Variable by vendor
SQL*Server
Truncate can be rolled back.
PostgreSQL
Truncate can be rolled back...
How do I use prepared statements in SQlite in Android?
How do I use prepared statements in SQlite in Android?
5 Answers
5
...
Remove items from one list in another
...
You will also need using System.Linq; if you didn't have it before.
– yellavon
Mar 11 '15 at 20:28
1
...
JQuery: 'Uncaught TypeError: Illegal invocation' at ajax request - several elements
...s).
So, instead of:
var data = {
'mode': 'filter_city',
'id_A': e[e.selectedIndex]
};
it should be:
var data = {
'mode': 'filter_city',
'id_A': e[e.selectedIndex].value
};
Note: check Jason Kulatunga's answer, it quotes JQuery doc to explain why passing an HTML...
How to set background color of an Activity to white programmatically?
...ned
// within the main layout you are using
View someView = findViewById(R.id.randomViewInMainLayout);
// Find the root view
View root = someView.getRootView();
// Set the color
root.setBackgroundColor(getResources().getColor(android.R.color.red));
...
How to remove padding around buttons in Android?
In my Android app, I have this layout:
17 Answers
17
...
Override setter with arc
Did I correctly override the setter when ARC is enabled?
3 Answers
3
...
Stop handler.postDelayed()
...use:
handler.removeCallbacksAndMessages(null);
Docs
public final void removeCallbacksAndMessages (Object token)
Added in API level 1 Remove any pending posts of callbacks and sent
messages whose obj is token. If token is null, all callbacks and
messages will be removed.
Or you cou...
Check if an element is a child of a parent
...ive it the selector, as in target.parent('div#hello').
Example: http://jsfiddle.net/6BX9n/
function fun(evt) {
var target = $(evt.target);
if (target.parent('div#hello').length) {
alert('Your clicked element is having div#hello as parent');
}
}
Or if you want to check to ...
COUNT DISTINCT with CONDITIONS
...elect
count(distinct tag) as tag_count,
count(distinct (case when entryId > 0 then tag end)) as positive_tag_count
from
your_table_name;
The first count(distinct...) is easy.
The second one, looks somewhat complex, is actually the same as the first one, except that you use case...when cla...