大约有 40,000 项符合查询结果（耗时：0.0302秒） [XML]
How do I (or can I) SELECT DISTINCT on multiple columns?
...INCT a,b,c FROM t
is roughly equivalent to:
SELECT a,b,c FROM t GROUP BY a,b,c
It's a good idea to get used to the GROUP BY syntax, as it's more powerful.
For your query, I'd do it like this:
UPDATE sales
SET status='ACTIVE'
WHERE id IN
(
SELECT id
FROM sales S
INNER JOIN
...
SqlException from Entity Framework - New transaction is not allowed because there are other threads
...ou can write your query like this:
foreach (var client in clientList.OrderBy(c => c.Id).QueryInChunksOf(100))
{
// do stuff
context.SaveChanges();
}
The queryable object you call this method on must be ordered. This is because Entity Framework only supports IQueryable<T>.Skip(in...
LAST_INSERT_ID() MySQL
...ollowing the insert:
$result = $conn->query("SELECT * FROM corex ORDER BY id DESC LIMIT 1");
while ($row = $result->fetch_assoc()) {
$id = $row['id'];
}
This retrieves the last id from the database.
s...
jQuery select2 get value of select tag?
...
for an select called by id name instead of class name, use: $(".first").val()
– Rui Martins
Jun 21 '17 at 9:15
...
jQuery select by attribute using AND and OR operators
I'm thinking about, if it is possible in jQuery to select elements by named attributes using AND and OR.
8 Answers
...
offsetting an html anchor to adjust for fixed header [duplicate]
...fixed header (I hope that makes sense). I need a way to offset the anchor by the 25px from the height of the header. I would prefer HTML or CSS, but Javascript would be acceptable as well.
...
Gridview with two columns and auto resized images
...trying to make a gridview with two columns. I mean two photos per row side by side just like this image.
2 Answers
...
How do you check if a certain index exists in a table?
...nd newer, a more concise method, coding-wise, to detect index existence is by using the INDEXPROPERTY built-in function:
INDEXPROPERTY ( object_ID , index_or_statistics_name , property )
The simplest usage is with the IndexID property:
If IndexProperty(Object_Id('MyTable'), 'MyIndex', 'IndexID...
HTML.ActionLink vs Url.Action in ASP.NET Razor
... point which I like is using Url.Action(...)
You are creating anchor tag by your own where you can set your own linked text easily even with some other html tag.
<a href="@Url.Action("actionName", "controllerName", new { id = "<id>" })">
<img src="<ImageUrl>" style"width:...
MongoDB and “joins” [duplicate]
...
What do you mean by "client side" and "server side"?
– scaryguy
Aug 14 '15 at 3:21
4
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