大约有 40,000 项符合查询结果(耗时:0.0349秒) [XML]

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Only initializers, entity members, and entity navigation properties are supported

...o convert your Paid property to SQL and can't because it's not part of the table schema. What you can do is let Entity query the table with no Paid filter and then filter out the not Paid ones. public ActionResult Index() { var debts = storeDB.Orders //.Where(o => o.Paid == false) ...
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How is Math.Pow() implemented in .NET Framework?

...plemented in the CLR, written in C++. The just-in-time compiler consults a table with internally implemented methods and compiles the call to the C++ function directly. Having a look at the code requires the source code for the CLR. You can get that from the SSCLI20 distribution. It was written arou...
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MySQL Query GROUP BY day / month / year

... Simple complete example: SELECT count(*), record_date FROM anytable WHERE anytable.anycolumn = 'anycondition' GROUP BY YEAR(record_date), month(record_date); note: record_date is a date type TIMESTAMP – renedet Jul 25 '17 at 18:35 ...
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MySQL - Using COUNT(*) in the WHERE clause

...similar to this: SELECT column_name, aggregate_function(column_name) FROM table_name WHERE column_name operator value GROUP BY column_name HAVING aggregate_function(column_name) operator value; share | ...
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Ordering by the order of values in a SQL IN() clause

...inputted by the query in MS SQL Server 2008+, it can be done by creating a table on the fly and doing a join like so (using nomenclature from OP). SELECT table1.name, table1.description ... FROM (VALUES (id1,1), (id2,2), (id3,3) ...) AS orderTbl(orderKey, orderIdx) LEFT JOIN table1 ON orderTbl.or...
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Search text in stored procedure in SQL Server

... ORDER BY ROUTINE_NAME END --TO FIND STRING IN ALL TABLES OF DATABASE. BEGIN SELECT t.name AS Table_Name ,c.name AS COLUMN_NAME FROM sys.tables AS t INNER JOIN sys.columns c ON t.OBJECT_ID ...
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Auto Resize Image in CSS FlexBox Layout and keeping Aspect Ratio?

...splay: flex to the cells too, so the image gets centered (I think display: table could have been used here as well with all this markup) share | improve this answer | follow ...
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How do I set a column value to NULL in SQL Server Management Studio?

...roperly answered the question but just to cover all the bases: Update myTable set MyColumn = NULL This would set the entire column to null as the Question Title asks. To set a specific row on a specific column to null use: Update myTable set MyColumn = NULL where Field = Condition. This wou...
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How to map a composite key with JPA and Hibernate?

...// getters, setters } The IdClass annotation maps multiple fields to the table PK. With EmbeddedId The class for the composite primary key could look like (could be a static inner class): @Embeddable public class TimePK implements Serializable { protected Integer levelStation; protecte...
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How to extract text from a PDF? [closed]

... I was given a 400 page pdf file with a table of data that I had to import - luckily no images. Ghostscript worked for me: gswin64c -sDEVICE=txtwrite -o output.txt input.pdf The output file was split into pages with headers, etc., but it was then easy to write a...