大约有 830 项符合查询结果（耗时：0.0375秒） [XML]
MySQL “NOT IN” query
...s for <> ANY, but for <> ALL!
http://dev.mysql.com/doc/refman/5.0/en/any-in-some-subqueries.html
SELECT c FROM t1 LEFT JOIN t2 USING (c) WHERE t2.c IS NULL
cant' be replaced by
SELECT c FROM t1 WHERE c NOT IN (SELECT c FROM t2)
You must use
SELECT c FROM t1 WHERE c <> ANY ...
Tool to read and display Java .class versions
...(1.7); 50.0=JavaSE6(1.6); 52.0=JavaSE8(1.8); 53.0=JavaSE9; 54.0=JavaSE10; 55.0=JavaSE11; 56.0=JavaSE12; 57.0=JavaSE13; 58.0=JavaSE14;
– nephewtom
Jul 24 '19 at 14:50
add a com...
How do I make a column unique and index it in a Ruby on Rails migration?
...:email_address)
class AddIndexToEmailAddress < ActiveRecord::Migration[5.0]
def change
change_table :people do |t|
t.index :email_address, unique: true
end
end
end
share
|
imp...
Making an array of integers in iOS
...ted an array of Doubles, you would use :
var array = [1.0, 2.0, 3.0, 4.0, 5.0, 6.0] // implicit type-inference
or:
var array: [Double] = [1, 2, 3, 4, 5, 6] // explicit type
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improve this...
What happened to “HelveticaNeue-Italic” on iOS 7.0.3
..., NULL);
}
It is also worth noting that in the current version of Xcode (5.0.1 (5A2053)) this font is not listed as an option in the Font drop down list in Interface Builder. So if you previously configured a label with this font you will notice that the ui is confused and the label ends up being ...
Reorder / reset auto increment primary key
... See alter table docs for changing AUTOINCREMENT dev.mysql.com/doc/refman/5.0/en/alter-table.html
– lreeder
Dec 9 '13 at 19:10
3
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How to chain scope queries with OR instead of AND?
...nto Rails core can be found here: github.com/rails/rails/pull/16052 Rails 5.0 is targeted for the official release of the .or chain functionality. I was able to use the monkey patch I mentioned on Rails >= 3.2; however you may want to wait for Rails 5 to introduce any long-standing changes to y...
MySQL check if a table exists without throwing an exception
...
If you're using MySQL 5.0 and later, you could try:
SELECT COUNT(*)
FROM information_schema.tables
WHERE table_schema = '[database name]'
AND table_name = '[table name]';
Any results indicate the table exists.
From: http://www.electrictoolbo...
iPhone UIView Animation Best Practice
...(afterAnimationProceedWithGame)];
// [UIView setAnimationRepeatCount:5.0]; // don't forget you can repeat an animation
// [UIView setAnimationDelay:0.50];
// [UIView setAnimationRepeatAutoreverses:YES];
gameView.alpha = 1.0;
topGameView.alpha = 1.0;
viewrect1...
Light weight alternative to Hibernate? [closed]
...
Version 5.0 was released in June 2016.
– Lauri Laanti
Aug 18 '16 at 14:21
...