How to create a datetime column with default value in sqlite3?
Solution 1:
Try this:
create table tbl1(id int primary key, dt datetime default current_timestamp);
Background:
The DEFAULT constraint specifies a default value to use when doing an INSERT. The value may be NULL, a string constant, a number, or a constant expression enclosed in parentheses. The default value may also be one of the special case-independant keywords CURRENT_TIME, CURRENT_DATE or CURRENT_TIMESTAMP. If the value is NULL, a string constant or number, it is inserted into the column whenever an INSERT statement that does not specify a value for the column is executed. If the value is CURRENT_TIME, CURRENT_DATE or CURRENT_TIMESTAMP, then the current UTC date and/or time is inserted into the columns. For CURRENT_TIME, the format is HH:MM:SS. For CURRENT_DATE, YYYY-MM-DD. The format for CURRENT_TIMESTAMP is "YYYY-MM-DD HH:MM:SS".
From http://www.sqlite.org/lang_createtable.html
Solution 2:
... default (datetime(current_timestamp))
The expression following default
must be in parentheses. This form is useful if you want to perform date arithmetic using SQLite date and time functions or modifiers.
Solution 3:
CURRENT_TIMESTAMP
is a literal-value just like 'mystring'
column-constraint:
literal-value: