The VSIZE function returns the number of bytes for X.
Syntax
VSIZE(X)
Return type
The number of bytes for x is returned. If x is NULL, the function returns NULL.
Examples
To create the employees table and insert data to the table, execute the following statements:
CREATE TABLE employees(manager_id INT,last_name varchar(50),hiredate varchar(50),SALARY INT);
INSERT INTO employees VALUES(300, 'Wei', '2019-09-11',23600);
INSERT INTO employees VALUES(200, 'Red', '2019-11-05', 23800);
INSERT INTO employees VALUES(100, 'Part', '2018-10-01',24000);
INSERT INTO employees VALUES(200, 'Ross', '2019-06-11',23500);
COMMIT;
To use the VSIZE function to query the number of bytes for manager_id = 300 in the last_name column, execute the following statement:
SELECT last_name, VSIZE (last_name) "BYTES" FROM employees WHERE manager_id = 300;
The following query result is returned:
+-----------+-------+
| LAST_NAME | BYTES |
+-----------+-------+
| Wei | 3 |
+-----------+-------+