How can i put the value of a variable in an SQL statement?

Hi,
Can someone please tell me how i can use a variable as part of an sql statement.
So instead of "SELECT * FROM tablename WHERE username='john'"
I can put in "SELECT * FROM tablename WHERE username.text"

What would happen if someone entered "(delete *
from tablename)" into the username field?The SELECT would fail and the DELETE
would never run.
Or am I missing something?Ok, that wasn't valid SQL, so lets change it into valid SQL. What would this do
"SELECT * FROM tablename WHERE username=" + user
where user is "blah;DROP TABLE tablename;"
The SQL would become
SELECT * FROM tablename WHERE username=blah;DROP TABLE tablename;
And that would select, and then drop the table
Kaj
Message was edited by:
kajbj

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