大约有 42,000 项符合查询结果（耗时：0.0527秒） [XML]
LINQ-to-SQL vs stored procedures? [closed]
... I cannot get over the performance deficit that is introduced by having to select data out of the database in order to update it (Attach() is also possible, but it's rather poopey)
– Ed James
Mar 2 '10 at 15:46
...
How to see log files in MySQL?
...print the value of error log, run this command in the terminal:
mysql -e "SELECT @@GLOBAL.log_error"
To read content of the error log file in real time, run:
sudo tail -f $(mysql -Nse "SELECT @@GLOBAL.log_error")
Note: Hit Control-C when finish
When general log is enabled, try:
sudo tail -f ...
Cannot convert lambda expression to type 'string' because it is not a delegate type [duplicate]
...ID == Value
orderby q.RowID descending
select q).FirstOrDefault();
Errors:
Error 241 Cannot convert lambda expression to type 'string' because it is not a delegate type
Error 242 Delegate 'System.Func<..>' does not take 1 arguments
Error 243 The name 'Valu...
Fastest hash for non-cryptographic uses?
... Just a quick note - I tried this with a much longer string (~5000 chars) and CRC32 was slower than MD5 and SHA1 on my machine (i7-6650U, 16GB). CRC32 - 1.7s , MD5 - 1.4s, SHA1 - 1.5s. Always test for yourself.
– Sam Tolton
Oct 24 '17 at 11:03
...
Permutations in JavaScript?
...
If you notice, the code actually splits the chars into an array prior to do any permutation, so you simply remove the join and split operation
var permArr = [],
usedChars = [];
function permute(input) {
var i, ch;
for (i = 0; i < input.length; i++) ...
Automating the InvokeRequired code pattern
...
Create a ThreadSafeInvoke.snippet file, and then you can just select the update statements, right click and select 'Surround With...' or Ctrl-K+S:
<?xml version="1.0" encoding="utf-8" ?>
<CodeSnippet Format="1.0.0" xmlns="http://schemas.microsoft.com/VisualStudio/2005/CodeSnip...
Like Operator in Entity Framework?
... where EF.Functions.Like(e.Title, "%developer%")
select e;
Comparing to ... where e.Title.Contains("developer") ... it is really translated to SQL LIKE rather than CHARINDEX we see for Contains method.
...
Disable EditText blinking cursor
...ible="false/true"
android:focusable="false/true"
To make edit_text Selectable to (copy/cut/paste/select/select all)
editText.setTextIsSelectable(true);
To focus on touch mode write following lines in XML
android:focusableInTouchMode="true"
android:clickable="true"
android:f...
ORA-30926: unable to get a stable set of rows in the source tables
... could do something like this:
MERGE INTO table_1 a
USING
(SELECT distinct ta.ROWID row_id
FROM table_1 a ,table_2 b ,table_3 c
WHERE a.mbr = c.mbr
AND b.head = c.head
AND b.type_of_action <> '6') src
ON ( a....
Install Marketplace plugin on Eclipse Juno
... only such official distribution). However, it is available for download.
Select Help/Install new software... from the menu, select the Juno update site (http://download.eclipse.org/releases/juno), and then look for the Marketplace client - it is in the General Purpose Tools category.
...