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SQL WHERE.. IN clause multiple columns
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@sleske: EXISTS is by far better: see my comments in my answer. And test it first,. @mrdenny: I misread your answer at first, I'd use EXISTS too
– gbn
Jul 16 '09 at 8:17
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Want to find records with no associated records in Rails
...u'd want to normalize out the data and index in that case. I might do that by creating a friend_ids hstore or serialized column. Then you could say Person.where(friend_ids: nil)
– Unixmonkey
Dec 20 '16 at 16:02
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Nesting await in Parallel.ForEach
...e thread for the duration of the async call.
You could “fix” that by blocking the ForEach() threads, but that defeats the whole point of async-await.
What you could do is to use TPL Dataflow instead of Parallel.ForEach(), which supports asynchronous Tasks well.
Specifically, your code cou...
Select top 10 records for each category
... FROM (
SELECT Field1,Field2, Rank()
over (Partition BY Section
ORDER BY RankCriteria DESC ) AS Rank
FROM table
) rs WHERE Rank <= 10
If your RankCriteria has ties then you may return more than 10 rows and Matt's solution may be better for y...
android get real path by Uri.getPath()
I'm trying to get image from gallery.
7 Answers
7
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Check a radio button with javascript
...# for identifier) with native JS.
Native JS solution:
document.getElementById("_1234").checked = true;
JQuery solution:
$("#_1234").prop("checked", true);
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what is the difference between GROUP BY and ORDER BY in sql
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ORDER BY alters the order in which items are returned.
GROUP BY will aggregate records by the specified columns which allows you to perform aggregation functions on non-grouped columns (such as SUM, COUNT, AVG, etc).
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Create unique constraint with null columns
...es are ugly, too. SQL92 identifiers with spaces in them are a misstep made by a committee. Don't use them.
– wildplasser
Nov 27 '11 at 22:20
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Remove array element based on object property
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what do you mean by the live nature of the array ? @Neit the Dark Absol
– sisimh
Jun 1 '15 at 12:46
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Entity Framework Migrations renaming tables and columns
...erated a new Migration in EF 5. As is usual with renames in EF migrations, by default it was going to drop objects and recreate them. That isn't what I wanted so I pretty much had to build the migration file from scratch.
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