大约有 46,000 项符合查询结果(耗时:0.0647秒) [XML]

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SQL Server: Get table primary key using sql query [duplicate]

... I also found another one for SQL Server: SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE WHERE OBJECTPROPERTY(OBJECT_ID(CONSTRAINT_SCHEMA + '.' + QUOTENAME(CONSTRAINT_NAME)), 'IsPrimaryKey') = 1 AND TABLE_NAME = 'TableName' AND TABLE_SCHEMA = 'Schema' ...
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Max or Default?

...d, you can get around this limitation by casting to a nullable within your select. My VB is a little rusty, but I think it'd go something like this: Dim x = (From y In context.MyTable _ Where y.MyField = value _ Select CType(y.MyCounter, Integer?)).Max Or in C#: var x = (from y...
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Insert picture into Excel cell [closed]

...ell as soon it comes close to it. If you have multiple images, you can select and insert all the images at once (as shown in step 4). You can also resize images by selecting it and dragging the edges. In the case of logos or product images, you may want to keep the aspect ratio of the image int...
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How do you get the index of the current iteration of a foreach loop?

...things in parallel ... that's exactly what the indexing form of Enumerable.Select does. – Jim Balter Oct 26 '13 at 0:57 11 ...
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SQL “between” not inclusive

... is interpreted as midnight when the day starts. One way to fix this is: SELECT * FROM Cases WHERE cast(created_at as date) BETWEEN '2013-05-01' AND '2013-05-01' Another way to fix it is with explicit binary comparisons SELECT * FROM Cases WHERE created_at >= '2013-05-01' AND created_at <...
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How to drop all user tables?

... BEGIN FOR cur_rec IN (SELECT object_name, object_type FROM user_objects WHERE object_type IN ('TABLE', 'VIEW', 'MATERIAL...
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MySQL Query - Records between Today and Last 30 Days

... You need to apply DATE_FORMAT in the SELECT clause, not the WHERE clause: SELECT DATE_FORMAT(create_date, '%m/%d/%Y') FROM mytable WHERE create_date BETWEEN CURDATE() - INTERVAL 30 DAY AND CURDATE() Also note that CURDATE() returns only the DATE portion...
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“Large data” work flows using pandas

...ns? What will typical operations look like. E.g. do a query on columns to select a bunch of rows and specific columns, then do an operation (in-memory), create new columns, save these. (Giving a toy example could enable us to offer more specific recommendations.) After that processing, then what do...
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How to export query result to csv in Oracle SQL Developer?

...worksheet toolbar) That's it. Method 2 Run a query Right click and select unload. Update. In Sql Developer Version 3.0.04 unload has been changed to export Thanks to Janis Peisenieks for pointing this out Revised screen shot for SQL Developer Version 3.0.04 From the format drop down...
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How do you configure an OpenFileDialog to select folders?

In VS .NET, when you are selecting a folder for a project, a dialog that looks like an OpenFileDialog or SaveFileDialog is displayed, but is set up to accept only folders. Ever since I've seen this I've wanted to know how it's done. I am aware of the FolderBrowserDialog, but I've never really like...