大约有 2,600 项符合查询结果（耗时：0.0107秒） [XML]
How do I obtain a Query Execution Plan in SQL Server?
...rosoft.com/sqlserver/2004/07/showplan' as sql),
CTE
as (SELECT CAST(TextData AS VARCHAR(MAX)) AS TextData,
ObjectID,
ObjectName,
EventSequence,
/*costs accumulate up the tree so the MAX should be the root*/
M...
SQL NVARCHAR and VARCHAR Limits
... the length of the varchar(n) string is greater than 4,000 characters the cast will be to nvarchar(4000) and truncation will occur.
Datatypes of string literals
If you use the N prefix and the string is <= 4,000 characters long it will be typed as nvarchar(n) where n is the length of the string...
What is boxing and unboxing and what are the trade offs?
...
from C# 3.0 In a Nutshell:
Boxing is the act of casting a value
type into a reference type:
int x = 9;
object o = x; // boxing the int
unboxing is... the reverse:
// unboxing o
object o = 9;
int x = (int)o;
...
Java 理论与实践: 线程池与工作队列 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...到达服务器，这种方式可能是通过网络协议（例如 HTTP、FTP 或 POP）、通过 JMS 队列或者可能通过轮询数据库。不管请求如何到达，服务器应用程序中经常出现的情况是：单个任务处理的时间很短而请求的数目却是巨大的。
构建...
Data binding to SelectedItem in a WPF Treeview
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The cast to TreeViewItem fails for me I assume because I am using a HierarchicalDataTemplate applied from resources by datatype. But if you remove ChangeSelectedItem, then binding to a viewmodel and retrieving the item works fine...
What is the difference between int, Int16, Int32 and Int64?
...ample works that way: the first literal 1, the 2, and the 3 are implicitly cast to short to fit them in the array, while the second literal 1 is left as an ordinary int. (int)1 is not considered equal to (short)1, (short)2, (short)3, thus the result is -1.
– user565869
...
Get size of all tables in database
...S SchemaName,
p.rows,
SUM(a.total_pages) * 8 AS TotalSpaceKB,
CAST(ROUND(((SUM(a.total_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS TotalSpaceMB,
SUM(a.used_pages) * 8 AS UsedSpaceKB,
CAST(ROUND(((SUM(a.used_pages) * 8) / 1024.00), 2) AS NUMERIC(36, 2)) AS UsedSpaceMB,
...
How does one generate a random number in Apple's Swift language?
...nteger between 0 and n-1.
let diceRoll = Int(arc4random_uniform(6) + 1)
Cast the result to Int so you don't have to explicitly type your vars as UInt32 (which seems un-Swifty).
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How to avoid overflow in expr. A * B - C * D
...ere's a work-around that only relies on implementation-defined behavior of casting unsigned integer to signed integer. But this can be expected to work on almost every system today.
(long long)((unsigned long long)A * B - (unsigned long long)C * D)
This casts the inputs to unsigned long long wher...
How can I convert NSDictionary to NSData and vice versa?
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For NSData -> NSDictionary, the cast to NSDictionary seems unnecessary.
– Pang
Dec 30 '15 at 8:11
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