LPAD adds characters to the left of an expression to a specified length.
Use RPAD to add characters to the right.
VARCHAR2 | CLOB
LPAD(expr1, n [, expr2 ])
expr1 is a text expression for the base string.
n is the total length of the returned expression.
If expr1 is longer than n, then this function truncates expr1 to n characters.
expr2 is a text expression for the padding characters. By default, it is a space.
LPAD('Page 1',15,'*.') returns the value *.*.*.*.*Page 1.
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