mysql> create table test(id int,hiredate timestamp); Query OK, 0 rows affected (0.01 sec) mysql> insert into test values(1,'20151208000000'); Query OK, 1 row affected (0.00 sec) mysql> create table test1(id int,hiredate datetime); Query OK, 0 rows affected (0.01 sec) mysql> insert...
importmysql.connector# 连接数据库cnx=mysql.connector.connect(host="localhost",user="your_username",password="your_password",database="your_database")# 创建游标cursor=cnx.cursor()# 执行查询query="SELECT event_name, event_timestamp FROM events"cursor.execute(query)# 处理结果for(event_name,event_...
importmysql.connectorimportdatetime# 创建数据库连接mydb=mysql.connector.connect(host="localhost",user="yourusername",password="yourpassword",database="yourdatabase")# 获取今天的日期today=datetime.date.today()# 创建游标对象cursor=mydb.cursor()# 执行查询语句query="SELECT * FROM yourtable WHERE DATE...
I am trying to subtract two unix timestamps in a mysql query namely:- SELECT FROM_UNIXTIME((SUBSTR(1304931465374,1,10) - SUBSTR(1304931480124, 1,10)) I was hoping for the result to be in the datetime format YYYY-MM-DD HH:MM:SS ...
mysql>insertintot2values(null,null,null); Query OK,1row affected (0.01sec) mysql>select*fromt2;+---+---+---+|ts1|ts2|ts3|+---+---+---+|NULL|NULL|NULL|+---+---+---+1rowinset(0.00sec) 这一次,建表语句中那些奇怪的默认值都没有...
mysql>ALTERTABLEtest_t1ADDtsp2TIMESTAMP;QueryOK,0rowsaffected(0.05sec)Records:0Duplicates:0Warnings:0mysql>DESCtest_t1;+---+---+---+---+---+---+|Field|Type|Null|Key|Default|Extra|+---+---+---+---+---+---+|tsp|timestamp|NO||CURRENT_TIMESTAMP|on updateCURRENT_TIMESTAMP||...
mysql> insert into helei values(NULL); Query OK, 1 row affected (0.39 sec) mysql> select * from helei; +---+ | a | +---+ | 2016-05-26 11:44:24 | +---+ 1 row in set (0.03 sec) 可以看到 explicit_defaults_for_timestamp 插入的NULL值变为当前时间,并没有被NOT NULL...
Query OK, 1 row affected (0.02 sec) mysql> INSERT INTO t1(id) VALUES(2); Query OK, 1 row affected (0.02 sec) mysql> SELECT * FROM t1; +---+---+ |id| b | +---+---+ | 1 | 2013-05-20 06:44:07 | | 2 | 2013-05-20 06:44...
前言 目录 1: TIMESTAMP受影响因素之一——MySQL时区简介 2:TIMESTAMP受影响因素之二——SQL_MODE简介 3:TIMESTAMP类型和DATETIME类型的比较 4:TIMESTAMP类型的默认行为 5:TIMESTAMP类型常见的线上问题 6:线…
Query OK, 0 rows affected (0.01 sec) mysql> DESC test_t1; +---+---+---+---+---+---+ | Field | Type | Null | Key | Default | Extra | +---+---+---+---+---+---+ | tsp | timestamp | NO | | CURRENT_TIMESTAMP ...