"trunc in sql" Code Answer's
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trunc sql
SELECT TRUNC(TO_DATE('27-OCT-92','DD-MON-YY'), 'YEAR')
"New Year" FROM DUAL;
New Year
---------
01-JAN-92
Source: docs.oracle.com
sql trunc
-- trunc(date, format) DUAL is for Oracle
SELECT trunc(sysdate) FROM DUAL; -- today 00:00:00
SELECT trunc(sysdate, 'Q') FROM DUAL; -- 1rst quarter day
SELECT trunc(sysdate, 'YEAR') FROM DUAL; -- 1rst year day
SELECT trunc(sysdate, 'MONTH') FROM DUAL; -- 1rst month day
Source: www.w3resource.com
what is truncate in sql
DELETE -
-DML COMMAND
-Delete Rows from the table one by one
-We can use where clause with Delete to delete single row
-Delete is slower than truncate
-ROLLBACK is possible with DELETE
DROP-
-DDL COMMAND
-Delete the entire structure or schema
-We can't use where clause with drop
-Drop is slower than DELETE & TRUNCATE
-ROLLBACK IS NOT POSSIBLE WITH DROP
TRUNCATE-
-DDL COMMAND
-Truncate deletes rows at a one goal
-We can't use where clause with Truncate
-Truncate faster than both DELETE & DROP
-Rollback is not possible with Truncate
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.
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