大约有 44,000 项符合查询结果（耗时：0.0393秒） [XML]
How should I store GUID in MySQL tables?
... SET $Data = REPLACE($Data,'-','');
SET $Result =
CONCAT( UNHEX(SUBSTRING($Data,7,2)), UNHEX(SUBSTRING($Data,5,2)),
UNHEX(SUBSTRING($Data,3,2)), UNHEX(SUBSTRING($Data,1,2)),
UNHEX(SUBSTRING($Data,11,2)),UNHEX(SUBSTRING($Data,9,2)),
...
Is String.Format as efficient as StringBuilder
...id some benchmarking:
http://jdixon.dotnetdevelopersjournal.com/string_concatenation_stringbuilder_and_stringformat.htm
Updated:
Sadly the link above has since died. However there's still a copy on the Way Back Machine:
http://web.archive.org/web/20090417100252/http://jdixon.dotnetdevelop...
How to change the default charset of a MySQL table?
...atabase, you can use this query and execute the resulted queries : SELECT concat('alter table ', table_name, ' CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;') FROM information_schema.tables WHERE table_schema='<your_database_name>' and table_collation != 'utf8_general_ci' GROUP BY ...
gulp.run is deprecated. How do I compose tasks?
...ly if needed or from within a watch.
var
gulp = require('gulp'),
concat = require('gulp-concat'),
markdown = require('gulp-showdown')
;
var scriptFiles = [ 'ang/app.js' ];
var markdownFiles = [ 'content/articles/*.md'];
var watchTask = function()
{
buildTask();
gulp.watch(scri...
Can you create nested WITH clauses for Common Table Expressions?
...paths AS (
SELECT
EmployeeID,
CONVERT(VARCHAR(900), CONCAT('.', EmployeeID, '.')) AS FullPath
FROM EmployeeHierarchyWide
WHERE ManagerID IS NULL
UNION ALL
SELECT
ehw.EmployeeID,
CONVERT(VARCHAR(900), CONCAT(p.FullPath, ehw.EmployeeID, '.')...
FIND_IN_SET() vs IN()
...ted companies name, not based on particular Id.
SELECT
(SELECT GROUP_CONCAT(cmp.cmpny_name)
FROM company cmp
WHERE FIND_IN_SET(cmp.CompanyID, odr.attachedCompanyIDs)
) AS COMPANIES
FROM orders odr
share
...
Given a DateTime object, how do I get an ISO 8601 date in string format?
...30:00
UtcNow obviously returns a UTC time so there is no harm in:
string.Concat(DateTime.UtcNow.ToString("s"), "Z")
share
|
improve this answer
|
follow
|
...
How to declare a variable in MySQL?
...
For any person using @variable in concat_ws function to get concatenated values, don't forget to reinitialize it with empty value. Otherwise it can use old value for same session.
Set @Ids = '';
select
@Ids := concat_ws(',',@Ids,tbl.Id),
tbl.Col1,
.....
Pad a string with leading zeros so it's 3 characters long in SQL Server 2008
...nt of Hogan's answer which I use in SQL Server Express 2012:
SELECT RIGHT(CONCAT('000', field), 3)
Instead of worrying if the field is a string or not, I just CONCAT it, since it'll output a string anyway. Additionally if the field can be a NULL, using ISNULL might be required to avoid function g...
JSON formatter in C#?
... ch == ',' && quotes % 2 == 0 ? ch + Environment.NewLine + String.Concat(Enumerable.Repeat(INDENT_STRING, indentation)) : null
let openChar = ch == '{' || ch == '[' ? ch + Environment.NewLine + String.Concat(Enumerable.Repeat(INDENT_STRING, ++indentation)) : ch.ToString()
le...