大约有 16,000 项符合查询结果（耗时：0.0258秒） [XML]
Split function equivalent in T-SQL?
...AX);
WITH CTE AS
(
SELECT 0 A, 1 B
UNION ALL
SELECT B, CONVERT(INT,CHARINDEX(@Delimiter, @Text, B) + LEN(@Delimiter))
FROM CTE
WHERE B > A
)
INSERT @A(V)
SELECT SUBSTRING(@Text,A,CASE WHEN B > LEN(@Delimiter) THEN B-A-LEN(@Delimiter) ELSE LEN(@Text) - A ...
How can I format a number into a string with leading zeros?
I have a number that I need to convert to a string. First I used this:
10 Answers
10
...
How do I initialize an empty array in C#?
...
string[] a = { };
[The elements inside the bracket should be implicitly convertible to type defined, for instance, string[] a = { "a", "b" };]
Or yet another:
var a = Enumerable.Empty<string>().ToArray();
Here is a more declarative way:
public static class Array<T>
{
public s...
How to get the CPU Usage in C#?
...ryObj = collection.Cast<ManagementObject>().First();
return Convert.ToInt32(queryObj["PercentIdleTime"]);
}
catch (ManagementException e)
{
MessageBox.Show("An error occurred while querying for WMI data: " + e.Message);
}
return -1;
}
...
What do the following phrases mean in C++: zero-, default- and value-initialization?
... if T is a scalar type (3.9), the object is set to the value of 0 (zero) converted to T;
— if T is a non-union class type, each nonstatic data member and each base-class subobject is zero-initialized;
— if T is a union type, the object’s first named data member is zero-initialized;
— i...
How to ALTER multiple columns at once in SQL Server
...ation, Skill_affected)
SELECT Diary_ID, Date, Diary_event_type_ID, CONVERT(varchar(MAX), Notes), Expected_call_volumes, Expected_duration, CONVERT(smallint, Skill_affected) FROM dbo.tblDiary WITH (HOLDLOCK TABLOCKX)')
GO
SET IDENTITY_INSERT dbo.Tmp_tblDiary OFF
GO
DROP TABLE dbo.tblDiary
GO
...
python dataframe pandas drop column using int
... I think you missed the point - they want to drop by index, not by label. Converting index into a label is just dropping by label :(
– Darren
May 9 '19 at 21:15
...
Unique ways to use the Null Coalescing operator [closed]
...he biggest advantage that I find to the ?? operator is that you can easily convert nullable value types to non-nullable types:
int? test = null;
var result = test ?? 0; // result is int, not int?
I frequently use this in Linq queries:
Dictionary<int, int?> PurchaseQuantities;
// PurchaseQu...
How do I use LINQ Contains(string[]) instead of Contains(string)
...le<T>, which has a Contains method. Therefore, it's not necessary to convert the array to an IList<T>. msdn.microsoft.com/en-us/library/19e6zeyy.aspx
– spoulson
Oct 13 '08 at 1:11
...
Finding the number of days between two dates
...
Convert your dates to unix timestamps, then substract one from the another. That will give you the difference in seconds, which you divide by 86400 (amount of seconds in a day) to give you an approximate amount of days in tha...