What were the dates of those transactions? | Do you mean the transactions with share count equal to or larger than 10? | Yes please, if you don't mind?
SELECT T2.date_of_transaction  FROM Ref_Transaction_Types AS T1 JOIN TRANSACTIONS AS T2 ON T1.transaction_type_code   =   T2.transaction_type_code WHERE T2.share_count   > =    10
transactions with share count equal to or larger than 10 refers to share_count >= 10; dates of those transactions refers to date_of_transaction; join operation is used to combine rows from two or more tables based on a related column between them.