【多选题】
A A.SELECT * FROM customers WHERE customer_id = ‘0001’；
B B.SELECT * FROM customers WHERE insert_date = DATE‘2019-01-01’；
C C.SELECT * FROM customers WHERE insert_date = ‘01-JAN-19’
D D.SELECT * FROM customers WHERE TO_CHAR(customer_id) = ‘0001’；
E E.SELECT * FROM customers WHERE customer_id = 0001；
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