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How to add a primary key to a MySQL table?
...mn, you can always add the primary key:
ALTER TABLE goods ADD PRIMARY KEY(id)
As to why your script wasn't working, you need to specify PRIMARY KEY, not just the word PRIMARY:
alter table goods add column `id` int(10) unsigned primary KEY AUTO_INCREMENT;
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How do you create a hidden div that doesn't create a line break or horizontal space?
I want to have a hidden checkbox that doesn't take up any space on the screen.
10 Answers
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Android: android.content.res.Resources$NotFoundException: String resource ID #0x5
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I am wondering why Android Studio does not advice you. I had the same problem setting an int value into TextView.setText for error.
– bheatcoker
Apr 22 '16 at 10:08
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Get the last inserted row ID (with SQL statement) [duplicate]
I want to get the new created ID when you insert a new record in table.
3 Answers
3
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How do I sort an NSMutableArray with custom objects in it?
...sortedArray = [drinkDetails sortedArrayUsingComparator:^NSComparisonResult(id a, id b) {
NSDate *first = [(Person*)a birthDate];
NSDate *second = [(Person*)b birthDate];
return [first compare:second];
}];
Performance
The -compare: and block-based methods will be quite a bit faster, in...
MongoDB - Update objects in a document's array (nested updating)
...o use the positional "$" operator. Something like:
db.bar.update( {user_id : 123456 , "items.item_name" : "my_item_two" } ,
{$inc : {"items.$.price" : 1} } ,
false ,
true);
Note that this will only increment the first matched subdocument in any...
Select element based on multiple classes
...tyling each class separately and using appropriate CSS specificity to override as best as you can.
– akamike
Mar 31 '10 at 17:07
2
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Is it possible to use a div as content for Twitter's Popover
... attribute. I was wondering if there was anyway to put a <div> inside the popover. Potentially, I would like to use php and mysql in there, but if i could get a div to work i think i can figure out the rest. I tried setting data-content to a div ID, but it didnt work.
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How to do SELECT COUNT(*) GROUP BY and ORDER BY in Django?
...y('total')
Transaction.objects.all().values('actor').annotate(total=Count('id')).order_by('total')
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how to listen to N channels? (dynamic select statement)
... the channel is closed).
You pass in an array of SelectCase structs that identify the channel to select on, the direction of the operation, and a value to send in the case of a send operation.
So you could do something like this:
cases := make([]reflect.SelectCase, len(chans))
for i, ch := range...