大约有 48,000 项符合查询结果（耗时：0.0198秒） [XML]
PostgreSQL Crosstab Query
...ating mentioned "extra columns"
Dynamic alternative to pivot with CASE and GROUP BY
\crosstabview in psql
Postgres 9.6 added this meta-command to its default interactive terminal psql. You can run the query you would use as first crosstab() parameter and feed it to \crosstabview (immediately or...
How do I extract text that lies between parentheses (round brackets)?
...ing regular expressions:
Regex.Match("User name (sales)", @"\(([^)]*)\)").Groups[1].Value
As a response to the (very funny) comment, here's the same Regex with some explanation:
\( # Escaped parenthesis, means "starts with a '(' character"
( # Parentheses in a regex me...
`Apache` `localhost/~username/` not working
...ly under your account then you can change the user.
To Find Your User and Group
In the Terminal use the id command to see your username and group
id
You will get a bunch of user groups, you need your primary user uid and group gid names
uid=502(your_user_name) gid=20(staff)
After edit /etc/...
How to get duplicate items from a list using LINQ? [duplicate]
...
var duplicates = lst.GroupBy(s => s)
.SelectMany(grp => grp.Skip(1));
Note that this will return all duplicates, so if you only want to know which items are duplicated in the source list, you could apply Distinct to the resulting sequ...
Avoiding memory leaks with Scalaz 7 zipWithIndex/group enumeratees
...%2fquestions%2f19128856%2favoiding-memory-leaks-with-scalaz-7-zipwithindex-group-enumeratees%23new-answer', 'question_page');
}
);
Post as a guest
Name
...
INNER JOIN ON vs WHERE clause
...2) ON <join_condition>
(4) WHERE <where_condition>
(5) GROUP BY <group_by_list>
(6) WITH {CUBE | ROLLUP}
(7) HAVING <having_condition>
(10) ORDER BY <order_by_list>
The first noticeable aspect of SQL that is different than other programming languages is the ...
Change an HTML5 input's placeholder color with CSS
...ed to ignore a rule with an unknown selector. See Selectors Level 3:
a group of selectors containing an invalid selector is invalid.
So we need separate rules for each browser. Otherwise the whole group would be ignored by all browsers.
::-webkit-input-placeholder { /* WebKit, Blink, Edge ...
How to configure Sublime Text 2/3 to use direct Ctrl+Tab order and to create new tabs after the last
... window = self.window
view = window.new_file()
active_group = window.active_group()
views_in_group = window.views_in_group(active_group)
window.set_view_index(view, active_group, len(views_in_group) - 1)
Save the above in Packages/User as <somename>.py. T...
SQL Server: SELECT only the rows with MAX(DATE)
... t2.OrderNo = t1.OrderNo
AND t2.PartCode = t1.PartCode
GROUP BY t2.OrderNo,
t2.PartCode
HAVING t1.DateEntered = MAX(t2.DateEntered))
This is the fastest of all the queries supplied above. The query cost came in at 0.0070668.
The preferred answer abov...
How do I use Ruby for shell scripting?
...tions)
chmod(mode, list, options)
chmod_R(mode, list, options)
chown(user, group, list, options)
chown_R(user, group, list, options)
touch(list, options)
Which is pretty nice
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