大约有 47,000 项符合查询结果(耗时:0.0143秒) [XML]

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How to see query history in SQL Server Management Studio

...been evicted, etc.), you may be able to find the query in the plan cache. SELECT t.[text] FROM sys.dm_exec_cached_plans AS p CROSS APPLY sys.dm_exec_sql_text(p.plan_handle) AS t WHERE t.[text] LIKE N'%something unique about your query%'; If you lost the file because Management Studio crashed, you...
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Correct use of Multimapping in Dapper

... I just ran a test that works fine: var sql = "select cast(1 as decimal) ProductId, 'a' ProductName, 'x' AccountOpened, cast(1 as decimal) CustomerId, 'name' CustomerName"; var item = connection.Query<ProductItem, Customer, ProductItem>(sql, (p, c) => { p.Cu...
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INSERT with SELECT

I have a query that inserts using a select: 8 Answers 8 ...
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Union Vs Concat in Linq

...ence is not changed. If you will override Equals and GetHashCode (used to select distinct items), then items will not be compared by reference: class X { public int ID { get; set; } public override bool Equals(object obj) { X x = obj as X; if (x == null) re...
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Unable to Cast from Parent Class to Child Class

... I think the examples are a bit extreme and selective and perhaps the cast is a shortcut for a copy constructor. For example, being building a ferrari with the properties defined in base object car. Or, start with a human and create a Boy. Casting and direct use? A...
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How do I convert from BLOB to TEXT in MySQL?

... That's unnecessary. Just use SELECT CONVERT(column USING utf8) FROM..... instead of just SELECT column FROM... share | improve this answer | ...
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What are the use cases for selecting CHAR over VARCHAR in SQL?

...'123 Main St Washington, MD 12345', 123.45) create view vwStagingTable AS SELECT CustomerFirstName = CAST(CustomerFirstName as CHAR(30)), CustomerLastName = CAST(CustomerLastName as CHAR(30)), CustomerCityStateZip = CAST(CustomerCityStateZip as CHAR(100)), CustomerCurrentBalance = CAST(CAST(Custome...
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How to iterate over values of an Enum having flags?

... .Split(new[] { ", " }, StringSplitOptions.None) .Select(v => (Items)Enum.Parse(typeof(Items), v)); // This method will always end up with the most applicable values value = Items.Bar | Items.Baz; values = value.ToString() .Split(new[] { ", " }, StringSplit...
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Replace a newline in TSQL

...e any of CR, LF or CR+LF. To get them all, you need something like this: SELECT REPLACE(REPLACE(@str, CHAR(13), ''), CHAR(10), '') share | improve this answer | follow ...
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Can anonymous class implement interface?

...implementation for you. Using the excellent LinFu project you can replace select new { A = value.A, B = value.C + "_" + value.D }; with select new DynamicObject(new { A = value.A, B = value.C + "_" + value.D }).CreateDuck<DummyInterface>(); ...