大约有 48,000 项符合查询结果(耗时:0.0238秒) [XML]

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SQL Server - Create a copy of a database table and place it in the same database?

... Use SELECT ... INTO: SELECT * INTO ABC_1 FROM ABC; This will create a new table ABC_1 that has the same column structure as ABC and contains the same data. Constraints (e.g. keys, default values), however, are -not- copied. ...
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List of all index & index columns in SQL Server DB

...lumns. EDIT: This query's getting pretty close to what you're looking for: SELECT TableName = t.name, IndexName = ind.name, IndexId = ind.index_id, ColumnId = ic.index_column_id, ColumnName = col.name, ind.*, ic.*, col.* FROM sys.indexes ind INNER JOI...
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Is there a Max function in SQL Server that takes two values like Math.Max in .NET?

... return isnull(@val2,@val1) end ... and you would call it like so ... SELECT o.OrderId, dbo.InlineMax(o.NegotiatedPrice, o.SuggestedPrice) FROM Order o share | improve this answer | ...
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How can I shift-select multiple checkboxes like GMail?

... can click on one checkbox in the email list, hold down the Shift key, and select a second checkbox. The JavaScript will then select/unselect the checkboxes that are between the two checboxes. ...
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How do you use script variables in psql?

...t myvariable value ... and can then be substituted, for example, as ... SELECT * FROM :myvariable.table1; ... or ... SELECT * FROM table1 WHERE :myvariable IS NULL; edit: As of psql 9.1, variables can be expanded in quotes as in: \set myvariable value SELECT * FROM table1 WHERE column1 ...
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Reliable method to get machine's MAC address in C#

...aces() where nic.OperationalStatus == OperationalStatus.Up select nic.GetPhysicalAddress().ToString() ).FirstOrDefault(); Or: String firstMacAddress = NetworkInterface .GetAllNetworkInterfaces() .Where( nic => nic.OperationalStatus == OperationalStatus.Up &&...
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byte[] to hex string [duplicate]

...); } static string LinqConcat(byte[] data) { return string.Concat(data.Select(b => b.ToString("X2")).ToArray()); } static string LinqJoin(byte[] data) { return string.Join("", data.Select( bin => bin.ToString("X2") ).ToArray()); } static string LinqAgg(b...
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Select rows of a matrix that meet a condition

...20, ncol = 4) colnames(m) <- letters[1:4] The following command will select the first row of the matrix above. subset(m, m[,4] == 16) And this will select the last three. subset(m, m[,4] > 17) The result will be a matrix in both cases. If you want to use column names to select columns...
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postgresql - replace all instances of a string within text field

...g regex replacment. Let's see how easy it is to replace a cat with a dog. SELECT regexp_replace('Cat bobcat cat cats catfish', 'cat', 'dog'); --> Cat bobdog cat cats catfish SELECT regexp_replace('Cat bobcat cat cats catfish', 'cat', 'dog', 'i'); --> dog...
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How do I search within an array of hashes by hash values in ruby?

... You're looking for Enumerable#select (also called find_all): @fathers.select {|father| father["age"] > 35 } # => [ { "age" => 40, "father" => "Bob" }, # { "age" => 50, "father" => "Batman" } ] Per the documentation, it "returns a...