total number of j class ships completed .
CREATE TABLE table_203_404 (
    id number,
    "pennant\nnumber" text,
    "name" text,
    "builder" text,
    "laid down" text,
    "launched" text,
    "completed" text,
    "fate" text
)
SELECT COUNT(*) FROM table_203_404 WHERE NOT "completed" IS NULL
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: total number of j class ships completed . ### Input: CREATE TABLE table_203_404 (
    id number,
    "pennant\nnumber" text,
    "name" text,
    "builder" text,
    "laid down" text,
    "launched" text,
    "completed" text,
    "fate" text
) ### Response: SELECT COUNT(*) FROM table_203_404 WHERE NOT "completed" IS NULL