datetime mysql default

The default setting method for datetime type in mysql, mysqldatetime An error occurred while modifying the default datetime value through the navicat client. The field type of the database table is datetime. The default value is NULL. When the

CausesIn the local database execution test platform database structure file Data_struct.sql, the execution of the build table statement resembles the following:CREATE TABLE' demo ' (' ID ' )int(Ten) unsigned not NULLAuto_increment,' name ' Longtext

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

Environment: MySQL Sever 5.1 + MySQL command line toolProblem: MySQL datetime data Type set the current time to the default valueSolve:Method One:Because the default value for the current field in MySQL does not support functions, it is not possible

ASCII (str) returns the ASCII value of the first character of the string str (0 if str is an empty string) mysqlgt; selectASCII ( ASCII (str) returns the ASCII value of the first character of the string str (0 if str is an empty string) mysqlgt;

ASCII (str)Returns the ASCII value of the first character of the string 'str' (0 is returned when 'str' is an empty string)Mysql> selectASCII ('2 ');-> 50Mysql> select ASCII (2 );->50Mysql> select ASCII ('dete ');-> 100ORD (str)If the string 'str'

Environment: MySQL Sever 5.1 + MySQL command line tool Problem: the current time of the MySQL datetime data type is set to the default value. Solution: Method 1: Because the default value of the current MySQL field does not support functions, it is

Environment: MySQL Sever 5.1 + MySQL command line tool Problem: MySQL datetime data Type set current time as default Solve: Method One: Because the default value of the current field in MySQL does not support functions, it is not possible to set

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

Execute SQL as follows:CREATE TABLE `qcloud_sms_template` ( `id` int(11) unsigned NOT NULL AUTO_INCREMENT, `ctime` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP, PRIMARY KEY(`id`),) ENGINE=InnoDB DEFAULT CHARSET=utf8;Execution Result:ERROR 106