大约有 44,000 项符合查询结果（耗时：0.0618秒） [XML]
Insert auto increment primary key to existing table
... tbl ADD id INT PRIMARY KEY AUTO_INCREMENT;
On a temporary table created for testing purposes, the above statement created the AUTO_INCREMENT id column and inserted auto-increment values for each existing row in the table, starting with 1.
...
YouTube API to fetch all videos on a channel
...s'ai: while requesting videos you are giving channelId, that is the filter for channel.
– akshay
Nov 19 '14 at 8:36
11
...
Facebook access token server-side validation for iPhone app
... token that you got from step 1.
The debug endpoint basically dumps all information about a token, so it'll respond with something like this:
{
data: {
app_id: YOUR_APP_ID,
is_valid: true,
metadata: {
sso: "iphone-safari"
},
application: YOUR...
How to debug Lock wait timeout exceeded on MySQL?
...es.
Since you know the query, all the tables being accessed are candidates for being the culprit.
From there, you should be able to run SHOW ENGINE INNODB STATUS\G
You should be able to see the affected table(s)
You get all kinds of additional Locking and Mutex Information.
Here is a sample from one...
get an element's id
...
Yes you can just use the .id property of the dom element, for example:
myDOMElement.id
Or, something like this:
var inputs = document.getElementsByTagName("input");
for (var i = 0; i < inputs.length; i++) {
alert(inputs[i].id);
}
...
Can table columns with a Foreign Key be NULL?
...
Yes, you can enforce the constraint only when the value is not NULL. This can be easily tested with the following example:
CREATE DATABASE t;
USE t;
CREATE TABLE parent (id INT NOT NULL,
PRIMARY KEY (id)
) ENGINE=INNO...
Possible to do a MySQL foreign key to one of two possible tables?
...
What you're describing is called Polymorphic Associations. That is, the "foreign key" column contains an id value that must exist in one of a set of target tables. Typically the target tables are related in some way, such as being instances of some common superclass of data. You'd also need anot...
Stop Mongoose from creating _id property for sub-document array items
If you have subdocument arrays, Mongoose automatically creates ids for each one. Example:
6 Answers
...
Custom Adapter for List View
I want to create a custom adapter for my list view. Is there any article that can walk me through how to create one and also explain how it works?
...
How to combine class and ID in CSS selector?
...g that the ID belongs to a div can only be detrimental to the rendering performance (albeit pretty much negligible) without any benefit to it as an ID is already unique. I'd go with #content.myClass instead to make it clean.
– mystrdat
Mar 29 '12 at 13:26
...