textfield and database

hi,
how can i insert my values from textfiels to database,just i need the query.i try something but it gives error like that
query="insert into country values('"+txtStdName.toString()+"')";
error is "value too long for type character varying(40)"
thanks for helping

Can you post the Sql command you've used to create the table country?

Yes, check the size for your table's columns.