SQL syntax in CB Conditional value

Hello:

Is there SQL syntax allowed in CB conditional value field?
If yes, what's the correct syntax?

eg.:

display: field conditional self
field: value
value: [cb:if some1_id="SELECT some2_id FROM #_some_table WHERE some3_id='nnnn'"]show[/cb:if]
operator: EQUAL TO
value: show
mode: show

Thx.

No, you'd need to use CB Query Field and a Query field to query for what you're wanting then condition against the query field.