大约有 21,000 项符合查询结果(耗时:0.0397秒) [XML]

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no gravity for scrollview. how to make content inside scrollview as center

I want the content inside the scrollView as center. 7 Answers 7 ...
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Why does MYSQL higher LIMIT offset slow the query down?

...ecords. It needs to check and count each record on its way. Assuming that id is a PRIMARY KEY of a MyISAM table, you can speed it up by using this trick: SELECT t.* FROM ( SELECT id FROM mytable ORDER BY id LIMIT 10000, 30 ) q JOIN ...
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Get Specific Columns Using “With()” Function in Laravel Eloquent

... Post::with(array('user'=>function($query){ $query->select('id','username'); }))->get(); It will only select id and username from other table. I hope this will help others. Remember that the primary key (id in this case) needs to be the first param in the $query->select() ...
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Remove duplicates in the list using linq

I have a class Items with properties (Id, Name, Code, Price) . 11 Answers 11 ...
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SQL select only rows with max value on a column [duplicate]

...All you need is a GROUP BY clause with the MAX aggregate function: SELECT id, MAX(rev) FROM YourTable GROUP BY id It's never that simple, is it? I just noticed you need the content column as well. This is a very common question in SQL: find the whole data for the row with some max value in a co...
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How to iterate object in JavaScript? [duplicate]

...in the array. var data = dictionary.data; for (var i in data) { var id = data[i].id; var name = data[i].name; } You can follow similar approach to iterate the image array. share | imp...
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What is the difference between partitioning and bucketing a table in Hive ?

...xample, suppose a table using date as the top-level partition and employee_id as the second-level partition leads to too many small partitions. Instead, if we bucket the employee table and use employee_id as the bucketing column, the value of this column will be hashed by a user-defined number into ...
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How to use GROUP BY to concatenate strings in SQL Server?

... [Note: This solution only works on SQL 2005 and later. Original question didn't specify the version in use.] CREATE TABLE #YourTable ([ID] INT, [Name] CHAR(1), [Value] INT) INSERT INTO #YourTable ([ID],[Name],[Value]) VALUES (1,'A',4) INSERT INTO #YourTable ([ID],[Name],[Value]) VALUES (1,'B',8) ...
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Correct use of Multimapping in Dapper

... 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.Customer = c; return p; }, splitOn:...
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Laravel Migration Change to Make a Column Nullable

I created a migration with unsigned user_id . How can I edit user_id in a new migration to also make it nullable() ? 9 ...