my html and js files are encoded by utf-8, and my test code is just like this:
var db = new SQL.Database();
db.run("create table test(a Integer, b varchar2);insert into test values (1, '语文');");

var stmt1 = db.prepare("select * from test;");
var stmt2 = db.prepare("select * from test where b = $keyword");
stmt.bind({$keyword: '语文'});

stmt1 can search it, but stmt2 can not, how it could be?