Get integer part of number

Question

So I have a table with numbers in decimals, say

id    value
2323   2.43
4954  63.98

And I would like to get

id    value
232         


        

Answer 1

Assuming you are OK with truncation of the decimal part you can do: SELECT Id, CAST(value AS INT) INTO IntegerTable FROM NumericTable

Answer 2

FLOOR,CAST... do not return integer part with negative numbers, a solution is to define an internal procedure for the integer part:

DELIMITER //
DROP FUNCTION IF EXISTS INTEGER_PART//

CREATE FUNCTION INTEGER_PART(n DOUBLE)

RETURNS INTEGER


DETERMINISTIC 

BEGIN

IF (n >= 0) THEN RETURN FLOOR(n);
            ELSE RETURN CEILING(n);      
END IF;


END
//

MariaDB [sidonieDE]> SELECT INTEGER_PART(3.7);
+-------------------+
| INTEGER_PART(3.7) |
+-------------------+
|                 3 |
+-------------------+
1 row in set (0.00 sec)

MariaDB [sidonieDE]> SELECT INTEGER_PART(-3.7);
+--------------------+
| INTEGER_PART(-3.7) |
+--------------------+
|                 -3 |
+--------------------+
1 row in set (0.00 sec)

after you can use the procedure in a query like that:

 SELECT INTEGER_PART(value) FROM table;

if you do not want to define an internal procedure in the database you can put an IF in a query like that:

 select if(value < 0,CEILING(value),FLOOR(value)) from table ;

Answer 3

SELECT FLOOR(value)

http://msdn.microsoft.com/en-us/library/ms178531.aspx

FLOOR returns the largest integer less than or equal to the specified numeric expression.