大约有 6,000 项符合查询结果（耗时：0.0226秒） [XML]
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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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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Post as a guest
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Set database from SINGLE USER mode to MULTI USER
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The “user is currently connected to it” might be SQL Server Management Studio window itself. Try selecting the master database and running the ALTER query again.
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程序员之网络安全系列（五）：数字证书以及12306的证书问题 - 更多技术 - ...
...natures), so your connection may not be private.），我猜他们是为了性能？？
但是，就算浏览器地址栏的锁不能变绿，我们还得订票不是吗？
我觉得12306可能需要一个操作系统内置的认证机构来发一个证书，不然普通的用户根本不知道怎...
How to do an update + join in PostgreSQL?
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coming from mysql it's unintuitive that the same join used for select won't also update just by adding a set phrase :( still - the syntax for this is probably easier for a newcomer to sql to master.
– WEBjuju
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What's the difference(s) between .ToList(), .AsEnumerable(), AsQueryable()?
..."Actual type: {0}", obj.GetType().Name);
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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:
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String.IsNullOrWhiteSpace in LINQ Expression
...eter] IS NULL) OR (LTRIM(RTRIM([t0].[Diameter])) = @p0))
and for Linq to SQL almost but not quite the same
DECLARE @p0 NVarChar(1000) = ''
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WHERE NOT (LTRIM(RTRIM([t0].[TypeName])) = @p0)
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Strings as Primary Keys in SQL Database [closed]
... I would agree there are a lot of variables to consider. (In sqlserver) we have seen real performance issues with using strings with lengths in the mid to high teens and above even when indexed. Buy you're right there are things to overcome this hardware for instance.
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How to query as GROUP BY in django?
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An easy solution, but not the proper way is to use raw SQL:
results = Members.objects.raw('SELECT * FROM myapp_members GROUP BY designation')
Another solution is to use the group_by property:
query = Members.objects.all().query
query.group_by = ['designation']
results = Query...