What Is TIMESTAMP In MySQL
A TIMESTAMP data type allows you to record a date and time like DATETIME data type. But it has some interesting features when used on a table column:► The first TIMESTAMP column in a table will be assigned with the current date and time, if it is not listed in an INSERT statement.► The first TIMESTAMP column in a table will be assigned with the current date and time, if it is not listed in an UPDATE statement.► If a TIMESTAMP column is assigned with NULL, the current date and time will be persisted to this column.► You can turn off the default current date and time on INSERT by defining the column with "DEFAULT 0".► The tutorial exercise below provides you 2 equivalent ways to create a TIMESTAMP column: CREATE TABLE links (lastDate TIMESTAMP); CREATE TABLE links (lastDate TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP);
2009-2016 downloadmela.com. All rights reserved.