将多行合并为1

Question

I have a table with courses from another school that tie to corresponding courses at our school. It is a one to many relation ship I'm trying to line it up all on one line based on the transferring school's course for example

schoolcode | subj | crsenum  |  oursubj  |  ourcrsenum
------------------------------------------------------
1234       | Art  | 100      |  VisArt   |     200
1234       | Art  | 100      |  VisArt   |     201

outcome I'm trying to get is

schoolcode | subj | crsnum  | oursubj1   | ourcrsnum1  |  oursubj2 | ourcrsnum2
--------------------------------------------------------------------------------
1234       | Art  | 100     | VisArt     |    200      |  VisArt   |  201

what I've tried still gives me two lines per transfer school course in the table there is also a sequence number corresponding to each course added that is attached to the one incoming course any help would be greatly appreciated! thanks

I apologize... I'm working in oracle/sqldeveloper this is information from one table where I'm just trying to select it and flatten it out to one row where the key is the schoolcode|subj|crsenum and then add to that row, all courses that we have associated with that one course. if there are more than 2, I would like to add it to the same row so for example if for school 1234 subj Art crsenum 100 there is also a course Drawing 200 at our school - I would like it to give me

1234     |  Art  | 100 | VisArt  | 200   | VisArt  | 201 | Drawing | 200

I hope that makes sense this is my first question ever

Answer 1

DECLARE @sql VARCHAR(MAX)
DECLARE @tbl VARCHAR(100)

SET @tbl = 'courses' -- put your table name here

SET @sql = 'SELECT schoolcode, subj, crsenum, ' 

SELECT @sql = @sql + ''''+ oursubj + '''' + ' AS oursubj' + CAST(ROW_NUMBER() OVER (ORDER BY ourcrsenum) AS VARCHAR) + ', ' + CAST(ourcrsenum AS VARCHAR) + ' AS crsenum' + CAST(ROW_NUMBER() OVER (ORDER BY ourcrsenum) AS VARCHAR) + ', '
  FROM courses

SET @sql = LEFT(@sql, LEN(@sql) - 1)

SET @sql = @sql + ' FROM ' + @tbl + ' GROUP BY schoolcode, subj, crsenum'

EXEC(@sql)

Result

schoolcode | subj | crsenum | oursubj1 | crsenum1 | oursubj2 | crsenum2
1234       | Art  | 100     | VisArt   | 200      | VisArt   | 201