SELECT i.InvoiceID FROM Invoices i LEFT CLEAVE Vendors v ON i.VendorID = v.VendorID
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2 changed files with 44 additions and 1 deletions
15
.vscode/settings.json
vendored
15
.vscode/settings.json
vendored
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@ -30,6 +30,21 @@
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"database": "WideWorldImporters",
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"database": "WideWorldImporters",
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"username": "ben",
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"username": "ben",
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"password": "pass"
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"password": "pass"
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},
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{
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"mssqlOptions": {
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"appName": "SQLTools",
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"useUTC": true,
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"encrypt": true
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},
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"previewLimit": 50,
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"server": "localhost",
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"port": 1433,
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"driver": "MSSQL",
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"name": "server (Examples)",
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"database": "Examples",
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"username": "ben",
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"password": "pass"
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}
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}
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]
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]
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}
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}
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@ -32,3 +32,31 @@ FROM Invoices
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JOIN Vendors ON Invoices.VendorID = Vendors.VendorID
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JOIN Vendors ON Invoices.VendorID = Vendors.VendorID
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WHERE PaymentDate IS NULL
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WHERE PaymentDate IS NULL
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ORDER BY InvoiceDueDate
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ORDER BY InvoiceDueDate
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-- Get all vendors with invoices
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-- inter-JOINs only return rows that match on both tables
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SELECT DISTINCT v.VendorID, VendorName FROM Vendors v
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JOIN Invoices i ON v.VendorID = i.VendorID
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-- Outer-JOIN: Returns all of a table plus anything in the other
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-- Get all vendors and invoices if they have any
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SELECT v.VendorID, VendorName, InvoiceID FROM Vendors v
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LEFT JOIN Invoices i ON v.VendorID = i.VendorID
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-- LEFT or RIGHT determines which is the "main one" that the other is joined to
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-- CROSS JOIN - combine the tables???
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SELECT v.VendorID, VendorName, InvoiceId
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FROM Vendors v CROSS JOIN Invoices i
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ORDER BY VendorID
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-- Get employees and their managers
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SELECT e.EmployeeID, e.LastName, e.FirstName, m.FirstName + ' ' + m.LastName ManagerName
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FROM Employees e JOIN Employees m ON e.ManagerID = m.EmployeeID
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-- Customers table has FK Cities, Cities FK State, State FK Countries
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-- To get full address of customers
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SELECT c.CustomerId, c.CustomerName, PostalAddressLine1, ci.CityName, sp.StateProvinceName, cty.CountryName
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FROM Sales.Customers c
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LEFT JOIN application.Cities ci ON c.DeliveryCityID = ci.CityID
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JOIN application.StateProvinces sp ON sp.StateProvinceID = ci.StateProvinceID
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JOIN application.Countries cty ON cty.CountryID = sp.CountryID
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