Problem with getting last inserted ID

Anybody have issues with retrieving the last inserted ID from db after an insert statement?

Assume a table student contains 3 fields (id, age, name). Here’s my code:

        var query = "INSERT INTO student(age, tagname) values (6, 'Bob') ";
        db = new sql.Request();
        db.query(query, function(err, data) {
        if (!err)
        {
            var str = "SELECT @@IDENTITY AS 'identity'";    
            db = new sql.Request();
            db.query(str, function(suberr, subdata)
            {
                console.log(" this is LAST inserted id : ");
                console.log(subdata);   // -> RETURNED NOTHING
            });
        }

The above code returned nothing as the ID eventhough the student record was captured correctly into the db.

OUTPUT

 this is last LAST inserted id :
[ { identity: null } ]

I am wondering if there’s something wrong with my code, or if this is a bug. Any feedbacks are appreciated.

PS. If I do another query in between the INSERT and SELECT @@IDENTITY, be it a select query, or insert query, then it would give me the ID that I am looking for.

[Loksly]

Just for the record, as you cannot warranty you are using the same connection of the pool, for both the insert and the select statement, you may choose to use a PreparedStatement or simply use the same query for both of them. Use it like this:

var query = "INSERT INTO demoTable(someValue) values ('someValue')";
query = query + ';select @@IDENTITY AS \'identity\''; // ---- this is what worked

request.query(str, function(suberr, subdata){
    console.log("Querying @@IDENTITY : ");
    console.log(subdata[0].identity);   // -> RETURNED VALUE
});

[dhensby]

This was answered 3 years ago https://github.com/tediousjs/node-mssql/issues/32#issuecomment-223278558