MySQL資料庫中有欄位型別是日期、時間的插入語句的寫法處理
MySQL資料庫中，與時間有關的型別有 DATE，TIME，TIMESTAMP：
時間戳mysql>
create table ts(f1 TIMESTAMP);
Query OK, 0 rows affected (0.13 sec)
mysql> desc date;
+-------+-----------+------+-----+-------------------+-----------------------------+
| Field | Type | Null | Key | Default | Extra |
+-------+-----------+------+-----+-------------------+-----------------------------+
| f1 | timestamp | NO | | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
+-------+-----------+------+-----+-------------------+-----------------------------+
具體範圍如下
mysql> insert into tsvalues(19700101080001);
Query OK, 1 row affected (0.20 sec)
mysql> insert into ts values(20371231235959);
Query OK, 1 row affected (0.19 sec)
mysql> select * from ts ;
+---------------------+
| f1 |
+---------------------+
| 1970-01-01 08:00:01 |
| 2037-12-31 23:59:59 |
+---------------------+
2 rows in set (0.00 sec)
格式
yyyymmddhhmmss、yymmddhhmmss、yyyymmdd或yymmdd格式
mysql> insert into ts values(19700101080001);
mysql> insert into ts values(19700102);
mysql> insert into ts values(371231);
mysql> insert into ts values(1231);
自動補上0
+---------------------+
| f1 |
+---------------------+
| 1970-01-01 08:00:01 |
| 2037-12-31 23:59:59 |
| 1970-01-02 00:00:00 |
| 2037-01-02 00:00:00 |
| 2037-12-31 00:00:00 |
+---------------------+
time 型別
mysql> create table shijian(f1 time);
Query OK, 0 rows affected (0.39 sec)
mysql> desc shijian;
範圍從 -8385959 到 8385959
+-------+------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+------+------+-----+---------+-------+
| f1 | time | YES | | NULL | |
+-------+------+------+-----+---------+-------+
mysql> insert into shijian values(-8385959);
Query OK, 1 row affected (0.08 sec)
mysql> insert into shijian values(8385959);
Query OK, 1 row affected (0.13 sec)
不足7位數字就從右到左賦值 沒有就賦0
mysql> insert into shijian values(159);
+------------+
| f1 |
+------------+
| 00:01:59 |
| 838:59:59 |
| -838:59:59 |
+------------+
DATETIME型別 範圍就是下面的最大最小值
mysql> desc dt;
+-------+----------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+----------+------+-----+---------+-------+
| f1 | datetime | YES | | NULL | |
+-------+----------+------+-----+---------+-------+
mysql> create table dt(f1 DATETIME);
mysql> insert into dt value(10000101);
mysql> insert into dt value(99991231);
mysql> insert into dt values(10000101000000);
Query OK, 1 row affected (0.14 sec)
mysql> insert into dt value(99991231235959);
Query OK, 1 row affected (0.17 sec)
+---------------------+
| f1 |
+---------------------+
| 1000-01-01 00:00:00 |
| 9999-12-31 00:00:00 |
| 9999-12-31 00:00:00 |
| 9999-12-31 23:59:59 |
| 1000-01-01 00:00:00 |
+---------------------+
日期
mysql> create table riqi(f1 date);
Query OK, 0 rows affected (0.11 sec)
mysql> desc riqi;
+-------+------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+------+------+-----+---------+-------+
| f1 | date | YES | | NULL | |
+-------+------+------+-----+---------+-------+
mysql> insert into riqi values(10000101);
mysql> insert into riqi values(99991231);
+------------+
| f1 |
+------------+
| 1000-01-01 |
| 9999-12-31 |
+------------+
年
mysql> create table nian(f1 year);
Query OK, 0 rows affected (0.28 sec)
mysql> desc nian;
+-------+---------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+---------+------+-----+---------+-------+
| f1 | year(4) | YES | | NULL | |
+-------+---------+------+-----+---------+-------+
mysql> insert into nian values(1970);
mysql> insert into nian values(2155);
可以使用2位
70以上(包括70)是2000年以前
70以下是2000以後
mysql> insert into nian values(69);
mysql> insert into nian values(70);
mysql> insert into nian values(20);
mysql> insert into nian values(80);
mysql> select * from nian;
+------+
| f1 |
+------+
| 1970 |
| 2155 |
| 1980 |
| 2020 |
| 2069 |
| 1970 |
+------+
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