Question

I have trouble grasping joins between more that two tables and it’s syntax.

I need to grab parent Staff Name, Vendor Name, Zone ordered by zone. Unsure if this is enough data.

TABLES

vendor
vendor_staff
type_zone

This is my weirdest attempt ever and I believe I’m very far away. I know that I’m missing possible enclosed parenthesis clauses.

QUERY

SELECT 
vendor.name AS Vendor, vendor_staff.vendorstaff AS Staff,type_zone.type AS Region
FROM dbo.vendor inner join dbo.type_zone
ON fkType_zoneID = pkType_ZoneID 
WHERE dbo.vendor.active = 1 and vendor_staff.fkVendorID = vendor.PkVendorID
ORDER BY type_zone.type, name

The three tables could be join using:

vendor.pkvendorID = vendor_staff.fkVendorID
type_zone.pkType_ZoneID = vendor.fkType_zoneID

The result should return per row Staff – > Vendor -> Zone

Answer 1

SELECT 
    Vendor = v.name,
    Staff = vs.vendorstaff,
    Region = t.[type]
FROM
    dbo.vendor AS v
INNER JOIN
    dbo.vendor_staff AS vs
    ON v.pkvendorID = fkVendorID
INNER JOIN
    dbo.type_zone AS t
    ON v.fkType_zoneID = t.pkType_ZoneID
WHERE
    v.active = 1
ORDER BY
    t.type,
    v.name;