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How to move columns in a MySQL table?
Currently I am having the following MySQL table: Employees (empID, empName, department);
4 Answers
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Two single-column indexes vs one two-column index in MySQL?
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"MySQL can use multiple-column indexes for queries that test all the columns in the index, or queries that test just the first column, the first two columns, the first three columns, and so on. If you specify the columns in th...
Preserving order with LINQ
...ement of source, selector is invoked and a sequence of values is returned.
Union - When the object returned by this method is enumerated, Union enumerates first and second in that order and yields each element that has not already been yielded.
Edit: I've moved Distinct to Preserving order base...
MySQL/SQL: Group by date only on a Datetime column
...son. I would expect it to fail anywhere else as well. Can you confirm that MySQL actually handles this query?
– Tomalak
Dec 14 '08 at 15:56
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Multi-statement Table Valued Function vs Inline Table Valued Function
... you pass as a "Company Number". Normally, you could create a view with a union all then filter by company number but I found that sometimes sql server pulls back the entire union and is not smart enough to call the one select. A table function can have logic to choose the source.
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Illegal mix of collations MySQL Error
...E your_table_name CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;
MySQL sneaks swedish in there sometimes for no sensible reason.
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Getting attributes of a class
...dict = {**type(mc).__dict__, **mc.__dict__}
# Or Python < 3.5
def dict_union(d1, d2):
z = d1.copy()
z.update(d2)
return z
combined_dict = dict_union(type(mc).__dict__, mc.__dict__)
attributes = [a for a, v in combined_dict.items()
if not re.match('<function.*?>'...
How do you concatenate Lists in C#?
... old but I came upon this post quickly thinking Concat would be my answer. Union worked great for me. Note, it returns only unique values but knowing that I was getting unique values anyway this solution worked for me.
namespace TestProject
{
public partial class Form1 :Form
{
publ...
Why was the switch statement designed to need a break?
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2. Antipatterns: Doesn't provide "clean" tagged unions, one of the two fundamental data-representation idioms of assembly. (Knuth, vol 1, ch 2) Instead, "untagged unions," a non-idiomatic hack. This choice has hobbled the way people think of data for decades. And NUL-termi...
【BLE技术内幕】BLE技术揭秘 - 创客硬件开发 - 清泛IT论坛，有思想、有深度
...个时间点把数据包发送出去，怎么保证数据的完整性，ACK如何接收，如何进行重传，以及如何对链路进行管理和控制等等。LL层只负责把数据发出去或者收回来，对数据进行怎样的解析则交给上面的GAP或者ATTHost Controller Interface，...