大约有 12,000 项符合查询结果（耗时：0.0321秒） [XML]
With Git, how do I turn off the “LF will be replaced by CRLF” warning
...g files before refreshing line endings"
Remove every file from Git's index.
git rm --cached -r .
Rewrite the Git index to pick up all the new line endings.
git reset --hard
Add all your changed files back, and prepare them for a commit. This
is your chance to inspect which file...
MySQL “Group By” and “Order By”
...Y fromEmail, timestamp
In order for the query to run efficiently, proper indexing is required.
Note that for simplification purposes, I've removed the LOWER(), which in most cases, won't be used.
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What are deferred objects?
... // for each object that we wait on
jQuery.each(args, function (index, element) {
// when that object resolves then
jQuery.when(element).then(function (value) {
// store value in the array or store an array of values in i...
LINQPad [extension] methods [closed]
... it:
var pb = new Util.ProgressBar("Analyzing data");
pb.Dump();
for (int index = 0; index <= 100; index++)
{
pb.Percent = index;
Thread.Sleep(100);
}
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How can I see the raw SQL queries Django is running?
Is there a way to show the SQL that Django is running while performing a query?
16 Answers
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JOIN queries vs multiple queries
...ctually wrote about this. For the most part, though, if you have the right indexes and you properly do your JOINs it is usually going to be faster to do 1 trip than several.
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Django - limiting query results
...
I tried this and got "Negative indexing is not supported."
– bparker
Mar 10 '19 at 19:32
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Only get hash value using md5sum (without filename)
... element of a bash array can be addressed by just the name without the [0] index, ie, $md5 contains only the 32 chars of the md5sum.
md5=($(md5sum file))
echo $md5
# 53c8fdfcbb60cf8e1a1ee90601cc8fe2
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Update one MySQL table with values from another
...er to read
As for running slow, how large are the tables? You should have indexes on tobeupdated.value and original.value
EDIT:
we can also simplify the query
UPDATE tobeupdated
INNER JOIN original USING (value)
SET tobeupdated.id = original.id
USING is shorthand when both tables of a join hav...
How to check Oracle database for long running queries
...
This one shows SQL that is currently "ACTIVE":-
select S.USERNAME, s.sid, s.osuser, t.sql_id, sql_text
from v$sqltext_with_newlines t,V$SESSION s
where t.address =s.sql_address
and t.hash_value = s.sql_hash_value
and s.status = 'ACTIVE'
and...