Xóa giây khỏi DATETIME trong MySQL

Để xóa giây từ DATETIME MySQL, dùng UPDATE và SET với cú pháp:

UPDATE tenBangCuaBan SET tenCotNgay = tenCotNgay - SECOND(tenCotNgay);

Tạo bảng:

mysql> CREATE TABLE DemoTable ( -> Shippingdatetime DATETIME -> ); Query OK, 0 rows affected (0.76 sec)

Chèn bản ghi:

mysql> INSERT INTO DemoTable VALUES('2019-01-21 12:05:20'); Query OK, 1 row affected (0.25 sec) mysql> INSERT INTO DemoTable VALUES('2019-03-01 10:23:35'); Query OK, 1 row affected (0.19 sec) mysql> INSERT INTO DemoTable VALUES('2019-06-09 11:00:56'); Query OK, 1 row affected (0.14 sec)

Hiển thị bản ghi:

mysql> SELECT * FROM DemoTable;

Kết quả

+---------------------+ | Shippingdatetime    | +---------------------+ | 2019-01-21 12:05:20 | | 2019-03-01 10:23:35 | | 2019-06-09 11:00:56 | +---------------------+ 3 rows in set (0.00 sec)

Truy vấn xóa giây:

mysql> UPDATE DemoTable SET Shippingdatetime = Shippingdatetime - SECOND(Shippingdatetime); Query OK, 3 rows affected (0.15 sec) Rows matched: 3 Changed: 3 Warnings: 0

Kiểm tra lại:

mysql> SELECT * FROM DemoTable;

Kết quả

+---------------------+ | Shippingdatetime    | +---------------------+ | 2019-01-21 12:05:00 | | 2019-03-01 10:23:00 | | 2019-06-09 11:00:00 | +---------------------+ 3 rows in set (0.00 sec)