大约有 37,000 项符合查询结果(耗时:0.0280秒) [XML]

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Fast way to discover the row count of a table in PostgreSQL

I need to know the number of rows in a table to calculate a percentage. If the total count is greater than some predefined constant, I will use the constant value. Otherwise, I will use the actual number of rows. ...
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jQuery delete all table rows except first

Using jQuery, how do I delete all rows in a table except the first? This is my first attempt at using index selectors. If I understand the examples correctly, the following should work: ...
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postgresql - add boolean column to table set default

Is this proper postgresql syntax to add a column to a table with a default value of false 5 Answers ...
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mysql :: insert into table, data from another table?

...correct method. But, if someone looking to insert more extra column in the table then you can get it from the following: INSERT INTO action_2_members (`campaign_id`, `mobile`, `email`, `vote`, `vote_date`, `current_time`) SELECT `campaign_id`, `from_number`, 'example@domain.xyz', `received_msg`, `d...
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Difference between local and global indexes in DynamoDB

...l Secondary Indexes still rely on the original Hash Key. When you supply a table with hash+range, think about the LSI as hash+range1, hash+range2.. hash+range6. You get 5 more range attributes to query on. Also, there is only one provisioned throughput. Global Secondary Indexes defines a new paradi...
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Find all tables containing column with specified name - MS SQL Server

Is it possible to query for table names which contain columns being 29 Answers 29 ...
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How to remove a lua table entry by its key?

I have a lua table that I use as a hashmap, ie with string keys : 1 Answer 1 ...
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Check if table exists and if it doesn't exist, create it in SQL Server 2008

I am writing a Stored procedure in SQL Server 2008. I need to check if a table exists in the database. If it doesn't then I need to create it. ...
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Populate data table from data reader

... You can load a DataTable directly from a data reader using the Load() method that accepts an IDataReader. var dataReader = cmd.ExecuteReader(); var dataTable = new DataTable(); dataTable.Load(dataReader); ...
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How to specify table's height such that a vertical scroll bar appears?

I have a table with many rows on my page. I would like to set table's height, say for 500px, such that if the height of the table is bigger than that, a vertical scroll bar will appear. I tried to use CSS height attribute on the table , but it doesn't work. ...