PL/SQL :: Equals (=) Versus LIKE For Date Data Type

First, I'm aware that the equals (=) operator is a "comparison operator compares two values for equality."  In other words, in an SQL statement, it won't return true unless both sides of the equation are equal.  For example:

SELECT * FROM Store WHERE Quantity = 200; The LIKE operator "implements a pattern match comparison" that attempts to match "a string value against a pattern string containing wild-card characters." 

For example:

SELECT * FROM Employees WHERE Name LIKE 'Chris%'; 

Here,I query about date type data on ORACLE database, I found the following, when I write select statment in this way:

SELECT ACCOUNT.ACCOUNT_ID, ACCOUNT.LAST_TRANSACTION_DATE FROM ACCOUNT WHERE ACCOUNT.LAST_TRANSACTION_DATE LIKE '30-JUL-07';

I get all rows I'm looking for. but when I use the sign equal =

instead :SELECT ACCOUNT.ACCOUNT_ID, ACCOUNT.LAST_TRANSACTION_DATE FROM ACCOUNT WHERE ACCOUNT.LAST_TRANSACTION_DATE = '30-JUL-07';

I get nothing even though nothing is different except the equal sign.