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_12722302_3 ( no VARCHAR, directed_by VARCHAR )

### Question ###
What's the number of the episode directed by Tucker Gates?

### Accurate SQL ###

SELECT no FROM table_12722302_3 WHERE directed_by = "Tucker Gates"