mysql boolean類型default 0/1 not true,false

You have to specify 0 (meaning false) or 1 (meaning true) as the default. Here is an example:

create table mytable (

     mybool boolean not null default 0
);

FYI: boolean is an alias for tinyint(1).

mysql> create table mytable (
    ->          mybool boolean not null default 0
    ->     );
Query OK, 0 rows affected (0.35 sec)

mysql> insert into mytable () values ();
Query OK, 1 row affected (0.00 sec)

mysql> select * from mytable;
+--------+
| mybool |
+--------+
|      0 |
+--------+
1 row in set (0.00 sec)

FYI: My test was done on the following version of MySQL:

mysql> select version();
+----------------+
| version()      |
+----------------+
| 5.0.18-max-log |
+----------------+

1 row in set (0.00 sec)

在mysql中設定欄位類型為boolean。mysql會自動變成tinyint(1)。明白了為什麼default value 為0/1。