mysql timestamp

MySQL date type DATETIME and TIMESTAMPThere are three types of dates in MySQL5: DATETIME, DATE, and TIMESTAMP, except that DATE is used to indicate a DATE without time and second, and the other two have time and second. TIMESTAMP can also be accurate to milliseconds. There is also a commonality, that is, their format is "not strict", very free, you generally thin

-00 00:00:00 ') ENGINE = MYISAM And according to the second article above, it should be: The following is a code fragment: The code is as follows Copy Code CREATE TABLE ' Test ' (' WW ' VARCHAR (9) Not NULL,' T1 ' TIMESTAMP not NULL DEFAULT Current_timestamp,' T2 ' TIMESTAMP on UPDATE current_timestamp not NULL DEFAULT current_timestamp) ENGINE = MYISAM But

This article mainly introduces the change analysis of TIMESTAMP in MySQL. For more information, see the default behavior of TIMESTAMP before MySQL 5.6.6: ■ If the NULL attribute is NOT explicitly declared for the TIMESTAMP column, the default value is not null. (For other d

When MySQL is installed, there are warning: [Root@localhost mysql]# scripts/mysql_install_db--user=mysql installing MySQL system tables ... 2015-08-13 14:20:09 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use--explicit_defaults_for_timestamp

Usually there is a field in the table that creates date, and other databases have the option of default values. MySQL also has a default value of timestamp, but in MySQL, not only is the insertion of the modification will also update the value of Timestamp! Thus, it is not the creation date, as the update date to use

Today, we are going to import the latest table into their previous machine to do temporary development, in the database import encountered a problem: incorrect table definition; There can is only one TIMESTAMP column with Current_timestamp in DEFAULT or on UPDATE clauseMore imported log hints are: Table error definitions, only one column in a table can be specified as a column of type TIMESTAMP, and use Cur

Usually there is a field in the table that creates date, and other databases have the option of default values. MySQL also has a default value of timestamp, but in MySQL, not only is the insertion of the modification will also update the value of Timestamp! Thus, it is not the creation date, as the update date to use

The default behavior of timestamp before MySQL 5.6.6: Timestamp column if the null attribute is not explicitly declared, the default is not NULL. (Other data types, if not declared as NOT NULL, allow null values.) Sets the timestamp column value to null and is automatically stored as the current timestamp.The first

-01-29 13:50:27 '); Select DATE (' 2013-01-29 13:50:27 '); Select year (' 2013-01-29 13:50:27 '); Select MONTH (' 2013-01-29 13:50:27 '); Select WEEK (' 2013-01-29 13:50:27 '); Select Day (' 2013-01-29 13:50:27 '); Select time (' 2013-01-29 13:50:27 '); Select Curtime (); Select Curdate (); Select Current_date; Select Current_time; Select Current_timestamp; Select Now () Vi. operation of the date: SELECT date_add (' 2013-01-29 13:50:27 ', INTERVAL 1 day); ' 2013-01-30 13:50:27 ' SELECT date_add

Set TimeStamp for multiple timestamp in mysql. The Default value is DEFAULT CURRENT_TIMESTAMP. The value of timestamp is automatically updated as the table changes. The value is on update CURRENT_TIMESTAMP. However, because a table ON www.2cto.com has only one field set CURRENT_TIMESTAMP no. Also note that create table

Analysis on solutions for creating and last updating timestamp fields in MySQL Before writing this article, clarify my MySQL version. Mysql> select version ();+ ------------ +| VERSION () |+ ------------ +| 5.5.29-log |+ ------------ +1 row in set (0.00 sec) This is the requirement. One table has a created_at field to

TIMESTAMP setting defaults is default Current_timestamp TIMESTAMP settings update automatically with table changes is on update current_timestamp But because There can be at most one field set in a table Current_timestamp It is not possible to set the default Current_timestamp on both lines. There's one more thing to note. Copy Code code as follows: CREATE TABLE ' Device ' ( ' ID ' INT (

MySQL, the same table multiple timesatmp fields set default, often an error. A table can have only one field that sets default. But sometimes only one field setting default also complains. Will report: incorrect table definition; There can be only one TIMESTAMP column with Current_timestamp in DEFAULT or on UPDATE clause But checking the code, found that only one ti