大约有 3,551 项符合查询结果（耗时：0.0358秒） [XML]
Entity Framework: There is already an open DataReader associated with this Command
...lso try to cast the query to ObjectQuery and call ToTraceString to see the SQL command. It is hard to track. I always turn on MARS.
– Ladislav Mrnka
Feb 1 '11 at 22:27
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MySQL “incorrect string value” error when save unicode string in Django
...em for me. The root cause being:
You cannot store 4-byte characters in MySQL with the utf-8 character set.
MySQL has a 3 byte limit on utf-8 characters (yes, it's wack, nicely summed up by a Django developer here)
To solve this you need to:
Change your MySQL database, table and columns to use...
How to get Top 5 records in SqLite?
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but limit dont work in sub query sqlite..whats the alternative
– Nauman Ash
Aug 16 at 11:51
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How do I modify fields inside the new PostgreSQL JSON datatype?
With postgresql 9.3 I can SELECT specific fields of a JSON data type, but how do you modify them using UPDATE? I can't find any examples of this in the postgresql documentation, or anywhere online. I have tried the obvious:
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Rails find record with zero has_many records associated [duplicate]
... @sixty4bit - It works because when you do includes it does a join. In a SQL join, you get all the fields of both tables (in this case cities and photos) for each row unless you change the projection of the query. So, he's using that to his advantage to check whether a required database identifier...
The EXECUTE permission was denied on the object 'xxxxxxx', database 'zzzzzzz', schema 'dbo'
... For some reason this is the only answer that works for me on SQL Server 2012. Giving my user explicit EXECUTE permission does not work. It only works if it inherits the permission through a role.
– Keith
Jan 22 '16 at 14:45
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What does ON [PRIMARY] mean?
I'm creating an SQL setup script and I'm using someone else's script as an example. Here's an example of the script:
4 Ans...
Received an invalid column length from the bcp client for colid 6
I want to bulk upload csv file data to sql server 2005 from c# code but I am encountering the below error -
7 Answers
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What's the difference(s) between .ToList(), .AsEnumerable(), AsQueryable()?
..."Actual type: {0}", obj.GetType().Name);
}
Let's try an arbitrary linq-to-sql Table<T>, which implements IQueryable:
ReportTypeProperties(context.Observations);
ReportTypeProperties(context.Observations.AsEnumerable());
ReportTypeProperties(context.Observations.AsQueryable());
The result:
Co...
SQL Server Management Studio SSMS tries to “save to file” instead of execute on F5
....new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f1227614%2fsql-server-management-studio-ssms-tries-to-save-to-file-instead-of-execute-on%23new-answer', 'question_page');
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