大约有 47,000 项符合查询结果（耗时：0.0386秒） [XML]
ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired
...table is already locked by some query. For example, you may have executed "select for update" and have not yet committed/rollbacked and fired another select query. Do a commit/rollback before executing your query.
share
...
jquery data selector
I need to select elements based on values stored in an element's .data() object. At a minimum, I'd like to select top-level data properties using selectors, perhaps like this:
...
Postgresql aggregate array
...
Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to repeat the columns on SELECT to GROUP BY,...
iOS 7 - Failing to instantiate default view controller
...ard, click anywhere in the white area and press command-a, then command-c (select all and copy)
Open your new storyboard and press command-v to paste the same exact setup
Go to your project settings, change your "Main Interface" to the new Main_iPhoneV2 (If it's your iPad and you're writing a univer...
Using Auto Layout in UITableView for dynamic cell layouts & variable row heights
... table view cell is tapped
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("You tapped cell number \(indexPath.row).")
}
}
Important Note:
It is the following two lines of code (along with auto layout) that make the variable cell height possi...
Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
...pent in iostream library code (full compiler optimizations), and switching from iostreams to OS-specific I/O APIs and custom buffer management does give an order of magnitude improvement.
...
How to make connection to Postgres via Node.js
...values($1, $2)", ['John', x]);
x = x - 1;
}
var query = client.query("SELECT * FROM junk");
//fired after last row is emitted
query.on('row', function(row) {
console.log(row);
});
query.on('end', function() {
client.end();
});
//queries can be executed either via text/parameter val...
SQL Server - Return value after INSERT
...
No need for a separate SELECT...
INSERT INTO table (name)
OUTPUT Inserted.ID
VALUES('bob');
This works for non-IDENTITY columns (such as GUIDs) too
share
|
...
Set cache-control for entire S3 bucket automatically (using bucket policies?)
...it can take some time.
Log in to AWS Management Console
Go into S3 bucket
Select all files by route
Choose "More" from the menu
Select "Change metadata"
In the "Key" field, select "Cache-Control" from the drop down menu
max-age=604800Enter (7 days) for Value
Press "Save" button
(thanks to @biplob ...
What's the difference between utf8_general_ci and utf8_unicode_ci?
...or "ǽ" == "æ". For sorting this makes sense but could be surprising when selecting via equalities or dealing with unique indices - bugs.mysql.com/bug.php?id=16526
– Mat Schaffer
Mar 13 '15 at 15:22
...