explain plan explaination

[Lily_Liu_2004]

DBAs,

I came across an explain plan like this:

Plan Table 
------------------------------------------------------------------------------------------------------------ 
| Operation                  |  Name    |  Rows | Bytes|  Cost  |  TQ  |IN-OUT| PQ Distrib | Pstart| Pstop | 
------------------------------------------------------------------------------------------------------------ 
| SELECT STATEMENT           |          |     1 |   51 |      3 |      |      |            |       |       | 
|  HASH JOIN                 |          |     1 |   51 |      3 | 2,02 | P->S |QC (RANDOM) |       |       | 
|   PARTITION RANGE ITERATOR |          |       |      |        | 2,02 | PCWP |            |     4 |     5 | 
|    TABLE ACCESS FULL       |EMP_RANGE |     3 |   87 |      1 | 2,00 | PCWP |            |     4 |     5 | 
|    TABLE ACCESS FULL       |DEPT      |    21 |  462 |      1 | 2,01 | P->P |PART (KEY)  |       |       | 
------------------------------------------------------------------------------------------------------------

What do all these columns like TQ, IN-OUT,PQ Distrib mean?
There is any link or documentation to explain all these columns?

Thanks,

[hacketta1]

http://download-west.oracle.com/docs...plan.htm#26006