Sum string in sql-CodePudding

I have a table:

Id Name
1  phucuong
2  ksks
3  na

I want output is:

phucuongksksna

how to write in sql?

I tried concat, but it is not working.

CodePudding user response：

In SQL Server:

SELECT Name AS [text()] FROM YourTable FOR XML PATH ('')

In MySQL:

SELECT  GROUP_CONCAT(Name SEPARATOR '') FROM YourTable

Another Solution SQL Server

SELECT STUFF  
(  
  (  
    SELECT ','  CAST(RTRIM(LTRIM(g.Name)) AS VARCHAR(MAX))  
    FROM YourTable g,YourTable e   
    WHERE g.Id=e.Id  
    FOR XMl PATH('')  
   ),1,1,''  
)

CodePudding user response：

In both a SQL Server DB and a Postgres DB, we can use STRING_AGG:

SELECT STRING_AGG(name,'') FROM yourtable;

In Oracle DB, we can use LISTAGG:

SELECT LISTAGG(name) FROM yourtable; -- or LISTAGG(name,''), both will do

In MariaDB, the same query like in MYSQL will work:

SELECT GROUP_CONCAT(name SEPARATOR '') FROM yourtable;

In SQLite DB, it's very similar to the previous one:

SELECT GROUP_CONCAT(name,'') FROM yourtable;

Of course, there are also other possibilities/functions to achieve this, but as far as I know, these are the most efficient options.