Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_50320 ( "Round" real, "Pick" real, "Overall" real, "Name" text, "Position" text, "College" text )

### Question ###
What is the lowest round of bob caldwell, who has a pick greater than 7 and an overall larger than 162?

### Accurate SQL ###

SELECT MIN("Round") FROM table_50320 WHERE "Pick" > '7' AND "Name" = 'bob caldwell' AND "Overall" > '162'