To achieve this output there are many ways:
1) Src --> SQ --> Seq --> Exp --> Fil --> Tgt
So in your Expression Transformation via Sequence Generator your records would get numbered.
And, in your filter you can give condition as NEXTVAL=1, and there is your output.
2) You can write a Query in your SQ Transformation itself.
SELECT * FROM TABLE_NAME WHERE PK=1;
Note: Please specify all the columns in place of *
3) Src --> SQ --> Rnk --> Tgt
Under Properties Tab, Select Top 1.
4) Src --> SQ --> Seq --> Agg --> Tgt
User FIRST function in Agg Trnfn for all Columns
Hope this helps you...If you find my answers useful VOTE on me.