Android: Retrive data from database for specific value
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I am making an android app that get the data from url stores it in to db(I am done till this stage) and use some of the field of that table. I tried to fetch the specific data using this sql query "select persons_name where persons_name=s" but there was an error "**I/Database(23722): sqlite returned: error code = 1, msg = near "FROM": syntax error**" 
I badly need it. Please help me.

Thank you.