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How to detect the database is NULL or not

 
Anonymous
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I want to use jdbc to check a database is NULL or not in my program. If it is not NULL, I want to check what tables(all tables) exist in this database and print them out. I don't know how to use sql to get them. Any body can teach me? Thanks!
 
Anonymous
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hi
which database u r using. if u r using oracle then may be i can help u. u can contact me at
naima_muzamal@netsolpk.com
 
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