timestamp vs datetime

Int (1). 4 byte storage, the length of the int is 4 bytes, the storage space is less than datatime, the int index storage space is also relatively small, the sorting and the query efficiency is relatively higher a little(2) The readability is

usually storage time with datetime type, and now many systems also use int storage time, what difference do they have? Individuals prefer to use int this is good for date calculations, so let's look at the kind of things that would be better. int(1).

Turn from:datetime vs. timestamp in MySQLSame1. DisplayThe timestamp column is displayed in the same format as the datetime column. In other words, the display width is fixed at 19 characters, and the format is Yyyy-mm-dd HH:MM:SS.Different1.

Problem Description:Requires storage of 13-bit millisecond-level timestamps, formatted as INT (13) in MySQL, overflow, auto-truncated to 2147483647Analysis:If you ask directly the scope of the int type of storage, it must be known, but the addition

Small knowledge A hash table, an in-memory object, uses a fast hashtable when the dictionary tables, record primary keys and content. @, encountered escape character, not escaped, direct output, that is. The escape character is a backslash/all

This article is reproduced from: http://www.cnblogs.com/zhangbo127/p/4548898.html Two ways to get the current time Import Datetime,time Now = Time.strftime ("%y-%m-%d%h:%m:%s") print now = Datetime.datetime.now () Print Now Get one hour, day

Tag: Time () clock text datetime off tuple res--elementTime Module Time Module Time Representation format:1.格式化时间: 【 2018-01-01 01:00:00 】2.时间戳: 【 1518407077.940927 】 -> 秒数(从1970开始到现今)3.以元组方式表示，九个元素(格式化元组) 元素如下: (1) tm_year=2018,

DB2 Vs MySQL series | comparison of data types between MySQL and DB2, db2mysql As MySQL Databases become more and more widely used, there are more and more demands for migration from DB2 to MySQL databases. During database migration, the first

Brief introduction:Description: This module is primarily used to map a relational database table to a class of py, the row maps to an instance of the Py class, and the column maps to the properties of the Py instance, because it is compatible with

ASP. net mvc V2 Preview 1 official homepage: http://aspnet.codeplex.com/can be downloaded here The following is a repost from a netizen, which is detailed: The preview version is in. NET 3.5 SP1 and VS 2008, which can work with ASP. net mvc 1.0 is