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23、(4-7) choose the best answer:

You need to display the first names of all customers from the CUSTOMERS table that contain the character 'e' and have the character 'a' in the second last position.

Which query would give the required output?

A) SELECT cust_first_name

FROM customers

WHERE INSTR(cust_first_name, 'e')<>'' AND

SUBSTR(cust_first_name, -2, 1)='a';

B) SELECT cust_first_name

FROM customers

WHERE INSTR(cust_first_name, 'e')<>0 AND

SUBSTR(cust_first_name, -2, 1)='a';

C) SELECT cust_first_name

FROM customers

WHERE INSTR(cust_first_name, 'e')<>0 AND

SUBSTR(cust_first_name, LENGTH(cust_first_name),-2)='a';

D) SELECT cust_first_name

FROM customers

WHERE INSTR(cust_first_name, 'e')IS NOT NULL AND

SUBSTR(cust_first_name, 1,-2)='a';

Answer:B