sql server 2008/2005

SELECT name, CAST(password AS varbinary(max)) AS PasswordHash FROM sys.syslogins

或者

SELECT name,sys.fn_varbintohexstr(CAST(password AS varbinary(max))) FROM sys.syslogins

爆破参见：http://stackoverflow.com/questions/173329/how-to-decrypt-a-password-from-sql-server

mysql：

select user,host,password from mysql.user