表 SQL语法格式说明：
示例：创建一个新的数据库
CREATE DATABASE [IF NOT EXISTS] database_name
[ [ WITH ] { [ OWNER [=] user_name ] |
[ TEMPLATE [=] template ] |
[ ENCODING [=] encoding ] |
[ LC_COLLATE [=] lc_collate ] |
[ LC_CTYPE [=] lc_ctype ] |
[ DBCOMPATIBILITY [=] compatibilty_type ] |
[ TABLESPACE [=] tablespace_name ] |
[ CONNECTION LIMIT [=] connlimit ]}[...] ];
