how to join tables in sql
JOINING 2 Tables in sql
SELECT X.Column_Name , Y.Column_Name2
FROM TABLES1_NAME X
INNER JOIN TABLES2_NAME Y ON X.Primary_key = Y.Foreign_key;
--FOR EXAMPLE
--GET THE FIRST_NAME AND JOB_TITLE
--USE EMPLOYEES AND JOBS TABLE
--THE RELATIONSHIP IS JOB_ID
SELECT E.FIRST_NAME , J.JOB_TITLE
FROM EMPLOYEES E
INNER JOIN JOBS J ON J.JOB_ID = E.JOB_ID;userdefined function cross apply all days into the future sql
USE Northwind
GO
SELECT o1.OrderID, o1.OrderDate, ca.OrderID AS NextOrder,
ca.OrderDate AS NextOrderDate, CustomerID,
DATEDIFF(DAY, o1.OrderDate,ca.OrderDate) DaysToNextOrder
FROM Orders AS o1
CROSS APPLY
(SELECT TOP 1 o.OrderDate, o.OrderID
FROM Orders AS o
WHERE o.customerID = o1.customerID
AND o.OrderID > o1.OrderID
ORDER BY OrderID) AS ca
ORDER BY CustomerID, o1.OrderIDCopyright © 2021 Codeinu
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