CREATE TABLE Transactions_Lots (transaction_id INT, lot_id INT)
CREATE TABLE Lots (lot_id INT, investor_id INT, lot_details VARCHAR)
CREATE TABLE Investors (investor_id INT, Investor_details VARCHAR)
CREATE TABLE Transactions (transaction_id INT, investor_id INT, transaction_type_code VARCHAR, date_of_transaction DATETIME, amount_of_transaction DECIMAL, share_count VARCHAR, other_details VARCHAR)
CREATE TABLE Purchases (purchase_transaction_id INT, purchase_details VARCHAR)
CREATE TABLE Sales (sales_transaction_id INT, sales_details VARCHAR)
CREATE TABLE Ref_Transaction_Types (transaction_type_code VARCHAR, transaction_type_description VARCHAR)

Show the average amount of transactions for different lots. Show the correlation.
SELECT lot_id, AVG(amount_of_transaction) FROM Transactions AS T1 JOIN Transactions_Lots AS T2 ON T1.transaction_id = T2.transaction_id GROUP BY T2.lot_id
SELECT "lot_id", AVG("amount_of_transaction") FROM "Transactions" AS "T1" JOIN "Transactions_Lots" AS "T2" ON "T1"."transaction_id" = "T2"."transaction_id" GROUP BY "T2"."lot_id"