trunc meaning in sql code example

Example 1: trunc sql

SELECT TRUNC(TO_DATE('27-OCT-92','DD-MON-YY'), 'YEAR')
  "New Year" FROM DUAL;
 
New Year
---------
01-JAN-92

Example 2: trunc in sql

TRUNC function returns a date truncated
to a specific unit of measure.
TRUNC function returns a date truncated
to a specific unit of measure.