Using LENGTH in PLSQL Query

https://randomsrsolutions.blogspot.com/2018/05/using-length-in-plsql-query.html

Shows the Length of a string as a numeric Value

Select LENGTH('ORACLE PLSQL') from dual;
12

Select ENAME  from EMP where LENGTH(ENAME) = 4;
KING
FORD
WARD

Select ENAME from EMP where ENAME Like '____';
KING
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WARD