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How to create a SQL Server function to “join” multiple rows from a subquery into a single delimited
...
If you're using SQL Server 2005, you could use the FOR XML PATH command.
SELECT [VehicleID]
, [Name]
, (STUFF((SELECT CAST(', ' + [City] AS VARCHAR(MAX))
FROM [Location]
WHERE (VehicleID = Vehicle.VehicleID)
FOR XML PATH ('')), 1, 2, '')) AS Locations
FROM [...
LINQ: “contains” and a Lambda query
...Here is how you can use Contains to achieve what you want:
buildingStatus.Select(item => item.GetCharValue()).Contains(v.Status) this will return a Boolean value.
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How can I reliably determine the type of a variable that is declared using var at design time?
...o resolve the type. For instance:
var items = myList.OfType<Foo>().Select(foo => foo.Bar);
The return type is IEnumerable<Bar>, but resolving this required knowing:
myList is of type that implements IEnumerable.
There is an extension method OfType<T> that applies to IEnume...
How to convert an entire MySQL database characterset and collation to UTF-8?
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You can create the sql to update all tables with:
SELECT CONCAT("ALTER TABLE ",TABLE_SCHEMA,".",TABLE_NAME," CHARACTER SET utf8 COLLATE utf8_general_ci; ",
"ALTER TABLE ",TABLE_SCHEMA,".",TABLE_NAME," CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci; ")
AS a...
MySQL - length() vs char_length()
... in two bytes. Or UTF-8, where the number of bytes varies. For example:
select length(_utf8 '€'), char_length(_utf8 '€')
--> 3, 1
As you can see the Euro sign occupies 3 bytes (it's encoded as 0xE282AC in UTF-8) even though it's only one character.
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强烈推荐一款非常mini的代码高亮开源软件--prism - 开源 & Github - 清泛网...
...复制出来后与原文完全一致。
行号展示要勾选相应的插件，调整一些样式后，最终的展示效果如下：
string limitSql = string.Empty;
if (!string.IsNullOrEmpty(CustomerNo))
limitSql += string.Format(" and t.customerno='{0}'", CustomerNo);
代码高亮 ...
7-Zip for 32/64位 v16.02 - 软件下载 - 清泛网 - 专注C/C++及内核技术
...大的的文件管理器
更给力的命令行版本
支持 FAR Manager 插件
支持 87 种语言
7-Zip 适用于 Windows 10 / 8 / 7 / Vista / XP / 2013 / 2008 / 2003 / 2000 / NT。并且有支持 Linux / Unix 平台的命令行移植版本。
在 Source Forge 的 7-Zip 页面（英文）中...
BLE数据收发 20个字节的限制问题 - 创客硬件开发 - 清泛IT社区，为创新赋能！
请问BLE插件只支持20个字节的数据接收与发送吗，我尝试超过20个字节就会自动忽略掉后面的字节RequestMTU – 为 BluetoothLE 连接请求新的最大传输单元 (MTU)。此功能仅在两个设备都支持蓝牙 4.2 或更高版本时才受支持。如果 MTU 更改...
C#: how to get first char of a string?
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Select the oldest tab to see that it as Matthew
– johnc
Oct 7 '10 at 5:10
11
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SQL Server 2008: How to query all databases sizes?
...
with fs
as
(
select database_id, type, size * 8.0 / 1024 size
from sys.master_files
)
select
name,
(select sum(size) from fs where type = 0 and fs.database_id = db.database_id) DataFileSizeMB,
(select sum(size) from fs wh...