mysql - Join two rows Distinctly -

-

If I have a table that 

  number 1 2 3 4 5 6 7 8 9

And I want to display the same table in two columns 

  SELECT t1.num, t2.num FROM (SELECT * FROM x ) AS T1, (SELECT * FROM x) AS T2

Then the result set appears 

  Number 1,1 2,2,3, 3,4,4,5,5,6,6,7,7,8,8 9

How do I do this in MySQL

Edit

Sorry, I did not want to make things complicated to start with: But this What is trying to do in the present

To make a bit more clear, what is actually trying to do? 

  num 1,2 2,3 3 , 4,5,5,6,6,7,8,8 9 / <>  
 Do I want to be able to forward:  
  SELECT t2 Note that the above query will return all 1s but the values ​​in my database are appearing individually above   
 Thanks in advance   
 
 
 I do not understand Why do not you just do something simple:  
  SELECT num as num1, num x to  
 
 or if you really want it As a string: 
 
  SELECT CONCAT (num, ',', num) x to num x  
 
 If you select twice the table You can join the table with you, but I do not know why you want to do this: 
 
  Selection Concat (T. 2 NNM) X AS T1 JOIN X AS T2 ON from SX NX Mr. 1 ANM = T2. NAM  
 
 will be more intuitive if you need fields from different rows, like '1,2', '2,3', etc. ... when you make your question So maybe you have some exaggerated things? Are you just trying to learn how to get involved in syntax?

Comments

Post a Comment

Popular posts from this blog

php - multilevel menu with multilevel array -

-
Just ask someone to solve this problem? I want to create a multilevel menu I can not find the right solution generated with multilevel array, it always gets an array_push error My study came from the original idea But still my Can not match the need. This is my MySQL [code] ----- --------------------- --------------- | ID | PARENT_ID | Name | Link | Seq | 1 | 0 | Dashboad | Dashboard / | 1 | 2 | 0 | Menu 1 | Menu 1 / | 2 | 3 | 0 | Menu 2 | Menu 2 / | 3 | 4 | 0 | Menu 3 | Menu 3 / | 4 | 5 | 2 | Joint Add / | 1 | 6 | 3 | Joint Add / | 1 | 7 | 2 | Edit | Edit / | 2 | 8 | 4 | Joint Add / | 1 ------------------------------------------ [/ Code] I want to do something like this in my array array ('dashboard' = & gt; array ('id' = & gt; '' 'Dame' = & gt; 'Dashboard', 'Title' = & gt; 'Dashboard', 'MatchMin' = & gt; Base_URL (). 'Dashboard /', 'Active' => = & Gt; NULL), ...
Read more

c# - TypeConverter in propertygrid only converts from string, not to -

-
When the property grid is reached, only the conversion mechanism (often called) is called "Foo!" Returns the property string in the grid when I click to edit I get an exception Type.oo. Object type can not be changed to type. (Not properly translated,) What is a clue from the convert format, why not? And the error indicates that it is trying to convert to a string, not from. I think that when I want to edit this object, it will have to be converted from foo to string, and when the editing ends. Public class FooTypeConverter: StringConverter {public override object ConvertFrom (ITypeDescriptorContext Reference, CultureInfo Culture, Object Value) {New Foo (string) value); } Convert the public override object (Type the ITE DiskText Contact Reference, CultureInfo Culture, Object Value, Type Type) {Return "Foo!"; } Public override bool CanConvertFrom (ITypeDescriptorContext reference, type source type) {back true; } Public Override Bull CanConvertTo (ITypeDescrip...
Read more

jQuery UI: Datepicker month format -

-
I am trying to change the format of the month that shows in the popup (not in the date that the picker actually I do not have any choice anywhere to do this, do I like to use a sub-string () or something else? What I normally display is Trying to change: Class = "ui-datepicker-title"> January & lt; / span & gt; ... & lt; / div & gt; Div>
Read more