mysql datetime query example

How do I represent the current time in MySQL?In fact, the expression is still quite a lot of, summarized as follows:Current_timestampCurrent_timestamp ()Now ()LocalTimeLocalTime ()LocaltimestampLocaltimestamp ()Ii. Comparison of Timestamp and

Introduction to timestamp basic knowledge Variant of the timestamp1,timestamp DEFAULT current_timestamp on UPDATE current_timestamp refreshes this data column when new records are created and existing records are modified 2,timestamp default

The difference between DATETIME, DATE, and TIMESTAMP in mysql is that the DATETIME, DATE, and TIMESTAMP types are similar. This article describes their characteristics and their similarities and differences. The DATETIME type can be used for values

This article mainly introduces the comparison of Datetime and Timestamp in Mysql. This article summarizes their similarities and differences and the introduction of time formats, for more information, see the three types of date, datetime, and

An introduction The principle of two indexes Three-indexed data structures Three MySQL index management Four Test indexes Five correct use index Six query optimization artifact-explain The basic steps of seven-slow query

MySQL常用指令，java，php程序员，数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the

Comparison between Datetime and Timestamp in Mysql, datetimetimestamp  In mysql, the three types of date, datetime, and timestamp (if int is used, four types) are easy to confuse. The following compares the similarities and differences between the

Comparison between Datetime and Timestamp in Mysql, datetimetimestamp In mysql, the three types of date, datetime, and timestamp (if int is used, four types) are easy to confuse. The following compares the similarities and differences between the

The same point of Timestamp and datetime: 1> Both can be used to represent the date of the Yyyy-mm-dd hh:mm:ss[.fraction] type. Different points of timestamp and datetime: 1> the two are stored in a different way. For timestamp, it stores the time

Difference and advantages of timestamp, datetime, int type in mysql bitsCN.com Differences and advantages of timestamp, datetime, and int types in mysql Int 1. occupies 4 bytes 2. fast query after an index is created 3. you can use between for