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_10842344_1 (no_in_season INTEGER, production_code VARCHAR)

### Question ###
What episode number had production code e4423?

### Accurate SQL ###

SELECT MAX(no_in_season) FROM table_10842344_1 WHERE production_code = "E4423"