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凤姐当天使 徐小平胡海泉薛蛮子王刚怎么看？ - 资讯 - 清泛网 - 专注C/C++...
...“投资界年会”上，且听徐小平、薛蛮子、王刚、胡海泉如何看待这一部“生态进化史”。
胡海泉：我不是著名天使投资人是先有名再来做投资
我不是著名投资人，是先有名再来做投资。著名投资人是真正投出来非常牛的项...
How to truncate milliseconds off of a .NET DateTime
... compare a time stamp from an incoming request to a database stored value. SQL Server of course keeps some precision of milliseconds on the time, and when read into a .NET DateTime, it includes those milliseconds. The incoming request to the system, however, does not offer that precision, so I need ...
Using column alias in WHERE clause of MySQL query produces an error
... use column aliases in GROUP BY, ORDER BY, or HAVING clauses.
Standard SQL doesn't allow you to
refer to a column alias in a WHERE
clause. This restriction is imposed
because when the WHERE code is
executed, the column value may not yet
be determined.
Copied from MySQL documentation
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Alternate output format for psql
I am using PostgreSQL 8.4 on Ubuntu. I have a table with columns c1 through cN . The columns are wide enough that selecting all columns causes a row of query results to wrap multiple times. Consequently, the output is hard to read.
...
CodeIgniter: Create new helper?
...n(){
$ci=& get_instance();
$ci->load->database();
$sql = "select * from table";
$query = $ci->db->query($sql);
$row = $query->result();
}
share
|
improve t...
What is the best collation to use for MySQL with PHP? [closed]
I'm wondering if there is a "best" choice for collation in MySQL for a general website where you aren't 100% sure of what will be entered? I understand that all the encodings should be the same, such as MySQL, Apache, the HTML and anything inside PHP.
...
How to get next/previous record in MySQL?
...ng that a primary key colum is not meant as a column to sort by, because MySQL does not guarantee that higher, auto incremented, values are necessarily added at a later time.
If you don't care about this, and simply need the record with a higher (or lower) id then this will suffice. Just don't use ...
How to round an average to 2 decimal places in PostgreSQL?
I am using PostgreSQL via the Ruby gem 'sequel'.
8 Answers
8
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Foreign Key to multiple tables
...
I am really new to SQL so correct me if this is wrong, but this design seems to be an approach to use when you are extremely confident that you will only need two owner types of a ticket. Down the road if a third ticket owner type were introduc...
Replace Line Breaks in a String C#
...actual newlines may not match. This happened to me why processing returned SQL. The new lines were \n, while Environment.NewLine was \r\n. The result was that nothing was matched so the new lines remained.
– Dono
Oct 2 '13 at 3:06
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