如何在Internet Explorer中使用javascript和ADO联接两个SQL表

Question

I'm using Javascript and Internet Explorer's ActiveXObjects to connect to a SQL database. I can read out results from a single table without a problem. Unfortunately, I can't figure out the syntax to join two tables that are in the same database. Here's what I'm trying:

//create object
var conn = new ActiveXObject("ADODB.Connection");

//store credentials
var connectionstring = "Provider=sqloledb; Data Source={omitted}; Initial Catalog={omitted}; User ID={omitted};Password={omitted}";

//open the db connection with credentials
conn.Open(connectionstring);

//create a new record set
var rs = new ActiveXObject("ADODB.Recordset");

//search the record set with SQL call
rs.Open("SELECT * FROM [order] INNER JOIN OrderItems ON (order.Id = OrderItems.Id)", conn);

If I delete "INNER JOIN" and everything after it, I'm fine. Note that I had to put brackets around the first table's name ("order") because I think it's a protected keyword... Anyone know the right syntax for this sort of thing in Javascript?

Answer 1

This is probably the SQL syntax you are looking for:

SELECT Orders.Id
FROM [Orders] 
INNER JOIN OrderItems ON [Orders].Id = OrderItems.Id

Note that the ( and ) is unnecessary.

If you want to use aliases, then you must use those aliases in the rest of the JOIN clause:

SELECT o.Id 
FROM [Orders] o
INNER JOIN OrderItems oi ON o.Id = oi.Id

Once you have the SQL nailed down, you should be able to pass it into the Open method:

var sql = 
    'SELECT Orders.Id ' +
    'FROM [Orders] ' +
    'INNER JOIN OrderItems ON [Orders].Id = OrderItems.Id';

rs.Open(sql, conn);