大约有 40,000 项符合查询结果(耗时:0.0276秒) [XML]

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Bring element to front using CSS

...28px; } .content { margin-left: auto; margin-right: auto; table-layout: fixed; border-collapse: collapse; z-index: -1; position:relative; } .td-main { text-align: center; padding: 80px 10px 80px 10px; border: 1px solid #A02422; background: #ABABA...
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How to execute a raw update sql with dynamic binding in rails

... MySQL: st = ActiveRecord::Base.connection.raw_connection.prepare("update table set f1=? where f2=? and f3=?") st.execute(f1, f2, f3) st.close I'm not sure if there are other ramifications to doing this (connections left open, etc). I would trace the Rails code for a normal update to see what it'...
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sql “LIKE” equivalent in django query

... Use __contains or __icontains (case-insensitive): result = table.objects.filter(string__contains='pattern') The SQL equivalent is SELECT ... WHERE string LIKE '%pattern%'; share | ...
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What's the difference between comma separated joins and join on syntax in MySQL? [duplicate]

For example if I were to have a table "Person" with a column "id" that references a column "id" in table "Worker" 5 Answers...
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What is the best collation to use for MySQL with PHP? [closed]

...names are involved. Depending on the implementation that uses the database tables, this problem could allow malicious users to create a username matching an administrator account. This problem exposes itself at the very least in early 5.x versions - I'm not sure if this behaviour as changed later. ...
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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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How to pull a random record using Django's ORM?

... solutions with order_by('?')[:N] are extremely slow even for medium-sized tables if you use MySQL (don't know about other databases). order_by('?')[:N] will be translated to SELECT ... FROM ... WHERE ... ORDER BY RAND() LIMIT N query. It means that for every row in table the RAND() function will ...
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How to convert a string or integer to binary in Ruby?

... Picking up on bta's lookup table idea, you can create the lookup table with a block. Values get generated when they are first accessed and stored for later: >> lookup_table = Hash.new { |h, i| h[i] = i.to_s(2) } => {} >> lookup_table[1]...
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How to change a table name using an SQL query?

How can I in change the table name using a query statement? 10 Answers 10 ...
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What does multicore assembly language look like?

.... All that's needed is software support for each thread to set up its own tables and messaging queues. The OS uses those to do the actual multi-threaded scheduling. As far as the actual assembly is concerned, as Nicholas wrote, there's no difference between the assemblies for a single threaded or...