Question

I have rows in a table Players like this.

+-----------+----+----+----+----+----+----+----+----+
|  USERNAME | A  | B  | C  | D  | E  | F  | G  | H  |
+-----------+----+----+----+----+----+----+----+----+
|   Mike    | 45 | 34 | 56 | 58 | 29 | 74 | 39 | 48 |
+-----------+----+----+----+----+----+----+----+----+

Now My Query should BE SOMETHING LIKE..

SELECT USERNAME FROM PLAYERS 
IF 
 (DIFFERENCE BETWEEN A & B <20)

IF
 (DIFFERENCE BETWEEN C & D <20)

IF
 (DIFFERENCE BETWEEN E & F <20)
IF
 (DIFFERENCE BETWEEN G & H <20)

Now .. I have to select username if any two out of four conditions are true..
Please help

Answer 1

Assumed SQL Server

select
   username 
from(
    SELECT USERNAME,
        case when abs(a-b)<20 then 1 else 0 end A
        case when abs(c-d)<20 then 1 else 0 end b
        case when abs(e-f)<20 then 1 else 0 end c
        case when abs(g-h)<20 then 1 else 0 end d
    FROM PLAYERS
)tmp
WHERE tmp.a+tmp.b+tmp.c+tmp.d>=2