大约有 3,558 项符合查询结果（耗时：0.0187秒） [XML]
How do I use ROW_NUMBER()?
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Also this is true only for Sql-Server, as other RDMBS have optimized the select count
– yoel halb
Jul 19 '12 at 15:01
add a com...
Cannot delete or update a parent row: a foreign key constraint fails
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In my case: I just ran a large SQL file and one of the final statements failed, so I just wanna delete all tables, fix the syntax error, and rerun, making this exactly what I was looking for.
– ekerner
Nov 5 '14 at 17...
Does Java have buffer overflows?
...ion to behave badly.
This latter form is less likely but a poorly written sql string cleansing function widely distributed that had a problem such as this would be an inviting target.
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impro...
How to check if mysql database exists
Is it possible to check if a (MySQL) database exists after having made a connection.
21 Answers
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Show a number to two decimal places
...ther reasons you may want this is you dont want rounding... or in my cause SQL floats returned are not treated the same as normal floats which is a PHP math bug
– Amb3rL4nn
Feb 22 '17 at 5:48
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PHP Constants Containing Arrays?
...e so sure they all have 5.6. Anyone on windows server just now got the 5.6 sql server drivers from microsoft about a month ago.
– M H
Jul 9 '15 at 5:28
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How to concatenate columns in a Postgres SELECT?
... is not a valid operator for string concatenation in Postgres (or standard SQL). It's a private idea of Microsoft to add this to their products.
There is hardly any good reason to use character(n) (synonym: char(n)). Use text or varchar. Details:
Any downsides of using data type "text" for storin...
Correct way to pass multiple values for same parameter name in GET request
...eryset.filter(model_id__in=id_filter)
which roughly speaking performs the SQL equivalent of
WHERE model_id IN ('a', 'b')
with the first request
and,
WHERE model_id IN ('a')
with the second request.
This would work with more than 2 parameter values in the request as well !
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Type or namespace name does not exist [closed]
... faced the same issue with an ASP.NET MVC site when I tried to use LINQ to SQL. I fixed the problem by:
Solution Explorer -> References -> Right-click on System.Data.Linq -> Copy Local (True)
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Laravel - Eloquent or Fluent random row
...l 3:
User::order_by(DB::raw('RAND()'))->get();
Check this article on MySQL random rows. Laravel 5.2 supports this, for older version, there is no better solution then using RAW Queries.
edit 1: As mentioned by Double Gras, orderBy() doesn't allow anything else then ASC or DESC since this change....