大约有 3,620 项符合查询结果(耗时:0.0145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:
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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
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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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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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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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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...
How do you create a Distinct query in HQL
...is a valid keywork for HQL, but I am looking for the HQL equivalent of the SQL keyword "distinct".
11 Answers
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