SHOW CREATE DATABASE [IF NOT EXISTS] dbname

Version dependant parts are displayed in appropriative comments:
CREATE DATABASE /*!32312 IF NOT EXISTS*/ `ucs` /*!40100 DEFAULT CHARACTER SET ucs2*/


client/mysqldump.c:
  SHOW CREATE DATABASE IF NOT EXISTS
sql/mysql_priv.h:
  SHOW CREATE DATABASE IF NOT EXISTS
sql/sql_db.cc:
  SHOW CREATE DATABASE IF NOT EXISTS
sql/sql_parse.cc:
  SHOW CREATE DATABASE IF NOT EXISTS
sql/sql_yacc.yy:
  SHOW CREATE DATABASE IF NOT EXISTS