大约有 47,000 项符合查询结果（耗时：0.0382秒） [XML]
Illegal mix of collations (utf8_unicode_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '=
...CIT) and (utf8_unicode_ci,IMPLICIT) for operation '='
$this->db->select("users.username as matric_no, CONCAT(users.surname,
' ',
users.first_name, ' ', users.last_name) as fullname")
->join('users', 'users.username=classroom_students.matric_no', 'left')
...
Extract elements of list at odd positions
...he first element (at position 0, because the indexes are 0-based) would be selected. In this case the second element will be selected.
Because the second element is omitted, the default is being used (the end of the list). So the list is being iterated from the second element to the end.
We also p...
Entity Attribute Value Database vs. strict Relational Model Ecommerce
...uld be domain models. Sort of like a serialization, but you could use SQL selects on indexed text fields. No multiple selects per record. All the "cost" happens in RAM.
– Zachary Scott
Jun 15 '10 at 3:06
...
Hidden Features of SQL Server
...xing table ?''',
@Command2 = 'dbcc dbreindex(''?'')',
@Command3 = 'select count (*) [?] from ?'
Also, sp_MSforeachdb
share
edited Feb 17 '10 at 2:34
...
Nesting await in Parallel.ForEach
..., "2", "3", "4", "5", "6", "7", "8", "9", "10" };
var customerTasks = ids.Select(i =>
{
ICustomerRepo repo = new CustomerRepo();
return repo.GetCustomer(i);
});
var customers = await Task.WhenAll(customerTasks);
foreach (var customer in customers)
{
Console.WriteLine(customer.ID);...
How to generate sample XML documents from their DTD or XSD?
... yes, this is the easiest way. Open XSD, switch to XML Schema Explorer, select the root node, right click and choose "Generate Sample Xml".
– balint
Jul 18 '09 at 16:58
3
...
Emacs bulk indent for Python
...
I use the following snippet. On tab when the selection is inactive, it indents the current line (as it normally does); when the selection is inactive, it indents the whole region to the right.
(defun my-python-tab-command (&optional _)
"If the region is active, s...
How to detect if a stored procedure already exists
...
IF object_id('YourSp') IS NULL
EXEC ('create procedure dbo.YourSp as select 1')
GO
ALTER PROCEDURE dbo.YourSp
AS
...
This way, security settings, comments and other meta deta will survive the deployment.
share
...
How to get a value from a cell of a dataframe?
...
Most answers are using iloc which is good for selection by position.
If you need selection-by-label loc would be more convenient.
For getting a value explicitly (equiv to deprecated
df.get_value('a','A'))
# this is also equivalent to df1.at['a','A']
In [55]: df1....
How do I do string replace in JavaScript to convert ‘9.61’ to ‘9:61’?
... $("#text").val(); // value = 9.61 use $("#text").text() if you are not on select box...
value = value.replace(".", ":"); // value = 9:61
// can then use it as
$("#anothertext").val(value);
Updated to reflect to current version of jQuery. And also there are a lot of answers here that would best ...