大约有 3,620 项符合查询结果(耗时:0.0173秒) [XML]

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Correct way of using JQuery-Mobile/Phonegap together?

... this is work for me. base on dhaval,this sample when I learn using sqlite <!DOCTYPE html> <html> <head> <title>Cordova Sqlite+Jquery</title> <script type="text/javascript" charset="utf-8" src="js/jquery-1.8.3.min.js"></script> <script type="t...
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LINQ OrderBy versus ThenBy

... the whole sequence) It may well not work in other providers (e.g. LINQ to SQL) It's basically not how OrderBy was designed to be used. The point of OrderBy is to provide the "most important" ordering projection; then use ThenBy (repeatedly) to specify secondary, tertiary etc ordering projections....
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What is the difference between BIT and TINYINT in MySQL?

... 64. The default is 1 if M is omitted. This data type was added in MySQL 5.0.3 for MyISAM, and extended in 5.0.5 to MEMORY, InnoDB, BDB, and NDBCLUSTER. Before 5.0.3, BIT is a synonym for TINYINT(1). TINYINT[(M)] [UNSIGNED] [ZEROFILL] A very small integer. The signed range is -128 ...
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What is the difference between persist() and merge() in JPA and Hibernate?

...e assigned generator, using merge instead of persist can cause a redundant SQL statement, therefore affecting performance. Also, calling merge for managed entities is also a mistake since managed entities are automatically managed by Hibernate and their state is synchronized with the database recor...
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Why is Lisp used for AI? [closed]

... minutes of macro work this week, I implemented an ad-hoc buggy version of SQL Select. It goes like this: (query SELECT * FROM dataset WHERE expr). – Paul Nathan Nov 12 '11 at 20:08 ...
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Creation timestamp and last update timestamp with Hibernate and MySQL

... I would do this using a MySQL trigger so that even if the full entity is not saved or is modified by any external application or manual query, it'll still update these fields. – Webnet Jul 25 '13 at 12:09 ...
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Automatically create an Enum based on values in a database lookup table?

...one also ; ), let the advanced students present it ... So here is the DDL SQL for the table : USE [ocms_dev] GO CREATE TABLE [dbo].[Role]( [RoleId] [int] IDENTITY(1,1) NOT NULL, [RoleName] [varchar](50) NULL ) ON [PRIMARY] So here is the console program producing the dll: using S...
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Why use 'virtual' for class properties in Entity Framework model definitions?

...rty allows you to denote it as the equivalent of a nullable Foreign Key in SQL. You do not HAVE to eagerly join every keyed table when performing a query, but when you need the information -- it becomes demand-driven. I also mentioned nullable because many navigation properties are not relevant ...
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how do you filter pandas dataframes by multiple columns

... However, I think the query syntax is neater and close to SQL, which makes it nice for data since. The chery on the cake is that it's faster with many rows :) – csgroen Aug 27 at 15:58 ...
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How can I measure the speed of code written in PHP? [closed]

...ink the DB request doesn't take much time ! This should be profiled on the SQL server, not PHP, so... Hope this is helpful :-) Have fun ! share | improve this answer | foll...