Export data from db2 with column names

Question

I want to export data from db2 tables to csv format.I also need that first row should be all the column names.

I have little success by using the following comand

Answer 1

Insert the column names as the first row in your table.

Use order by to make sure that the row with the column names comes out first.

Answer 2

After days of searching I solved this problem that way:

 EXPORT TO ...
 SELECT 1 as id, 'COL1', 'COL2', 'COL3' FROM sysibm.sysdummy1
 UNION ALL
 (SELECT 2 as id, COL1, COL2, COL3 FROM myTable)
 ORDER BY id

You can't select a constant string in db2 from nothing, so you have to select from sysibm.sysdummy1. To have the manually added columns in first row you have to add a pseudo-id and sort the UNION result by that id. Otherwise the header can be at the bottom of the resulting file.

Answer 3

Quite old question, but I've encountered recently the a similar one realized this can be achieved much easier in 11.5 release with EXTERNAL TABLE feature, see the answer here: https://stackoverflow.com/a/57584730/11946299

Example:

$ db2 "create external table '/home/db2v115/staff.csv' 
using (delimiter ',' includeheader on) as select * from staff"
DB20000I  The SQL command completed successfully.
$ head /home/db2v115/staff.csv | column -t -s ',' 
ID  NAME      DEPT  JOB    YEARS  SALARY    COMM
10  Sanders   20    Mgr    7      98357.50  
20  Pernal    20    Sales  8      78171.25  612.45
30  Marenghi  38    Mgr    5      77506.75  
40  O'Brien   38    Sales  6      78006.00  846.55
50  Hanes     15    Mgr    10     80659.80  
60  Quigley   38    Sales         66808.30  650.25
70  Rothman   15    Sales  7      76502.83  1152.00
80  James     20    Clerk         43504.60  128.20
90  Koonitz   42    Sales  6      38001.75  1386.70