大约有 12,000 项符合查询结果（耗时：0.0212秒） [XML]
Counting null and non-null values in a single query
...a column...
If that is correct:
SELECT count(*) FROM us WHERE a IS NULL
UNION ALL
SELECT count(*) FROM us WHERE a IS NOT NULL
Edited to have the full query, after reading the comments :]
SELECT COUNT(*), 'null_tally' AS narrative
FROM us
WHERE a IS NULL
UNION
SELECT COUNT(*), 'not_null...
Fixing slow initial load for IIS
...ult every 1740 minutes (29 hours).
From technet:
Internet Information Services (IIS) application pools can be
periodically recycled to avoid unstable states that can lead to
application crashes, hangs, or memory leaks.
As long as app pool recycling is left on, it should be enough.
But if ...
How can I SELECT rows with MAX(Column value), DISTINCT by another column in SQL?
...source INT)
INSERT INTO @TestTable
SELECT 1, 10, '2009-03-04', 'john', 399 UNION
SELECT 2, 11, '2009-03-04', 'juliet', 244 UNION
SELECT 5, 12, '2009-03-04', 'borat', 555 UNION
SELECT 3, 10, '2009-03-03', 'john', 300 UNION
SELECT 4, 11, '2009-03-03', 'juliet', 200 UNION
SELECT 6, 12, '2009-03-03', 'b...
Difference between Select Unique and Select Distinct
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XPath OR operator for different nodes
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+ operator for array in PHP?
...and array)
)
So the logic of + is equivalent to the following snippet:
$union = $array1;
foreach ($array2 as $key => $value) {
if (false === array_key_exists($key, $union)) {
$union[$key] = $value;
}
}
If you are interested in the details of the C-level implementation head t...
Return a value if no rows are found in Microsoft tSQL
...ight be a dead horse, another way to return 1 row when no rows exist is to UNION another query and display results when non exist in the table.
SELECT S.Status, COUNT(s.id) AS StatusCount
FROM Sites S
WHERE S.Id = @SiteId
GROUP BY s.Status
UNION ALL --UNION BACK ON TABLE WITH NOT EXISTS
SELECT 'N/...
How to add ASP.NET 4.0 as Application Pool on IIS 7, Windows 7
...menu and right click Computer and select Manage
Expand the left-hand side (Services and Applications) and select Internet Information Services
You'll now have a new applet within the content window exclusively for IIS.
Expand out your computer and locate the Application Pools node, and select it....
How to fix: Handler “PageHandlerFactory-Integrated” has a bad module “ManagedPipelineHandler” in its
...olution:
Goto: Turn Windows features on or off -> Internet Information Services -> World Wide Web Services -> Application Development Features -> Enable ASP.NET 4.5
This should resolve the issue.
share
...
Hosting ASP.NET in IIS7 gives Access is denied?
...up a application in my IIS7 that uses .NET Framework 4.0 (runned by NetworkService) but when browsing the site I get this:
...