SQL & PL/SQL

Hi all,

I need all your advise in making an important decisions of my career path.I work in the IT field and have about total 4-5 years of work experience involving development and testing in a product based organization.

Presently-i have got chance since last 4-5 months to work with writing PLSQL code,SQL etc on a part basis. I am very much interested to continue my career path as a PLSQL developer.

But, unfortunately -in the total of my work experience-in the past 2-3 years-i worked with a internally developed DB query language(similar to SQL) and then from last few months with plsql. But this chance to work with PLSQL has been for less time and limited scope after which i will have to work on something different.
Ii want to fully take on my career in SQL,PLSQL as Database Developer.
Please advise me if my thinking seems logical and good and if I could do it. I have planned on applying for relevant SQL,PLSQL profile jobs.

Now, My serious worry and concern is I feel that since i have worked very less with PLSQL-so am low in confidence that I feel i wont be able to answer ,or tell or not knowledgeable enough to be able to clear the technical interviews for SQL,plsql development profile which would need at least some years of experience.

I have started studying and practsing PLSQL,sql by myself for from internet. So, can you all please advise me on how could i prepare myself for hard core technical interviews of SQL,PLSQL knowledge for about 2-3 years expertise.

I know its not much possible to be competent so much in the subject by just studying and practicing.Its easy as saying to study and get it by myself-but i want to try and will put my best for it.

Please help me with your inputs,all interview questions,hard ones-suggestions,links,any study materials, real time problems which i can try solving of SQL, PLSQL development.

Thanks All