How many orders does Lucas Mancini has?
CREATE TABLE invoices (
    customer_id VARCHAR
)

CREATE TABLE customers (
    id VARCHAR,
    first_name VARCHAR,
    last_name VARCHAR
)
SELECT COUNT(*) FROM customers AS T1 JOIN invoices AS T2 ON T1.id = T2.customer_id WHERE T1.first_name = "Lucas" AND T1.last_name = "Mancini"
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: How many orders does Lucas Mancini has? ### Input: CREATE TABLE invoices (
    customer_id VARCHAR
)

CREATE TABLE customers (
    id VARCHAR,
    first_name VARCHAR,
    last_name VARCHAR
) ### Response: SELECT COUNT(*) FROM customers AS T1 JOIN invoices AS T2 ON T1.id = T2.customer_id WHERE T1.first_name = "Lucas" AND T1.last_name = "Mancini"