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_15325 ( "Version" text, "Code name" text, "Release date" text, "API level" real, "Distribution" text )

### Question ###
with api level of 18, what's the code name?

### Accurate SQL ###

SELECT "Code name" FROM table_15325 WHERE "API level" = '18'