I would like to ask what are the main differences between Dynamic SQL Adapter service and Custom SQL Adapter service?

Is it possible to input SQL statement as the input parameter in the dynamic SQL of the Adapter service?

e.g.
The SQL in the Adapter service:
SELECT * FROM (?)
The input parameter:
“SELECT a, b, c FROM table1 WHERE d = 1”

I found the solution for my second question.
We can use ${xxx} in the SQL of Adapter service instead of ?.

e.g.
The SQL in the Adapter service:
SELECT * FROM (${inSql})
The input parameter:
“SELECT a, b, c FROM table1 WHERE d = 1”
The SQL run will become SELECT * FROM ( SELECT a, b, c FROM table1 WHERE d = 1)