Row numbers for a query in informix

Question

I am using informix database, I want a query which you could also generate a row number along with the query

Like

select row_number(),firstName,lastN         


        

Answer 1

Given a table called Table3 with 3 columns:

colnum  name   datatype
======= =====  ===
1       no     text;
2       seq    number;
3       nm     text;

NOTE: seq is a field within the Table that has unique values in ascending order. The numbers do not have to be contiguous.

Here is query to return a rownumber (RowNum) along with query result

SELECT table3.no, table3.seq, Table3.nm,
      (SELECT COUNT(*) FROM Table3 AS Temp
         WHERE Temp.seq < Table3.seq) + 1 AS RowNum
    FROM Table3;