"我硕士毕业后,生小孩,带小孩歇了2年,以前学的作的全都忘了,一直想做coding,但是一直都没有做成。"
-- Master, child, two years break... Nice!
-- Love coding? you must be very smart.
"最近在公司作software configuration management.但是我想做oracle database 管理,也很想做嵌入式系统,也很想做coding,可是老觉得自己年龄太大,不知道做什么才好。"
-- Nice to have the relatively easy job now;
-- age 30 is not old;
-- even you like it, try to avoid coding if you can;
-- Oracle DBA is the best choice in above list, but hard to enter;
-- embedded system and other coding is not good direction for you to go;
-- since you love coding, I believe you have the capability to do it. This is very goos and important. If possible, instead of find Oracle DBA, try to start as database engineer, "Shell /Java/Perl/Php/C/C++ + SQL + some business knowledge + your system configure experience" will bring you database analyst job. This kind of the job is relatively easy to enter, nice life style.
"如在美国,做database 和coding 那个更适合?"
-- As said above, try to do database associated work. Easier life, higher pay and planty of jobs.
"有时候不是说兴趣的问题,真是精力不如以前,学起东西来也觉得吃力,不如以前得心应手。看着别人做得都还算成功,比如作project manager, 钱也多。心理觉得自己太失败了。"
-- Come on, age 30 is not old;
-- Project manager is good job? high pay? better ask the project manager what they want...
Glad you are thinking forward, you will find a good job...