大约有 19,000 项符合查询结果（耗时：0.0551秒） [XML]
SQL left join vs multiple tables on FROM line?
...ELECT * -- for simplicity
FROM Company, Department, Employee
WHERE Company.ID *= Department.CompanyID
AND Department.ID = Employee.DepartmentID
Note that the last one there is an inner join, in order to fulfill the criteria that you only want departments with people.
Ok, so what happens now. We...
How to change the session timeout in PHP?
...sion.gc_maxlifetime', 3600);
// each client should remember their session id for EXACTLY 1 hour
session_set_cookie_params(3600);
session_start(); // ready to go!
This works by configuring the server to keep session data around for at least one hour of inactivity and instructing your clients that ...
SQL SELECT speed int vs varchar
...your (say) 8-byte ints are longer than ascii varchars holding some textual IDs of avg length 3-4 chars. So, this answer - being imprecise and lacking any specific context or experimental results - doesn't really answer the question. Everyone knows that varchars are allowed to take much more space th...
Using the “animated circle” in an ImageView while loading stuff
...is block of xml in your activity layout file:
<RelativeLayout
android:id="@+id/loadingPanel"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:gravity="center" >
<ProgressBar
android:layout_width="wrap_content"
android:lay...
Javascript Object push() function
...ects, so use the right data structure.
var data = [];
// ...
data[0] = { "ID": "1", "Status": "Valid" };
data[1] = { "ID": "2", "Status": "Invalid" };
// ...
var tempData = [];
for ( var index=0; index<data.length; index++ ) {
if ( data[index].Status == "Valid" ) {
tempData.push( dat...
How to scroll up or down the page to an anchor using jQuery?
I'm looking for a way to include a slide effect for when you click a link to a local anchor either up or down the page.
14 ...
Android ListView headers
...wType should return what type of View we have at the input position.
Android will then take care of passing you the right type of View in convertView automatically.
Here what the result of the code below looks like:
First we have an interface that our two list item types will implement
publ...
How can I generate an INSERT script for an existing SQL Server table that includes all stored rows?
...
It's a hidden option IMHO. Should be more apparent... :)
– Leniel Maccaferri
Jun 8 '12 at 8:21
...
How do I handle ImeOptions' done button click?
...p with a combination of Roberts and chirags answers:
((EditText)findViewById(R.id.search_field)).setOnEditorActionListener(
new EditText.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
// Identifier of the action...
Generating a unique machine id
I need to write a function that generates an id that is unique for a given machine running a Windows OS.
15 Answers
...