What is the lowest Frequency where the Hemholtz pitch is d?
CREATE TABLE table_name_48 (
    frequency___hz__ INTEGER,
    helmholtz_pitch VARCHAR
)
SELECT MIN(frequency___hz__) FROM table_name_48 WHERE helmholtz_pitch = "d"
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: What is the lowest Frequency where the Hemholtz pitch is d? ### Input: CREATE TABLE table_name_48 (
    frequency___hz__ INTEGER,
    helmholtz_pitch VARCHAR
) ### Response: SELECT MIN(frequency___hz__) FROM table_name_48 WHERE helmholtz_pitch = "d"