All about Joins using SQL in HANA

WRITTEN BY: supportmymoto.com STAFF

Hello All,

Everyone knows about Joins and idea .

Lets do it in HANA studio and canopy under factors :

  • Overview of HANA studio
  • Joins idea
  • Creating Schema
  • Creating Tables
  • Insert Values into Tables
  • Utilizing SQL to grasp under Joins in HANA Studio

             – Inside Be part of

             – Left Outer Be part of

             – Proper Outer Be part of

             – Full Outer Be part of

First lets create Schema during which tables can be created for Evaluation

We’re writing code to create Schema – Joins_Demo, refer under display shot for identical.

Create Schema - 1.JPG

We’re going to create under two tables in Schema which can be used for explaining the Joins

Screen shots of table from excel - 2.JPG

Consult with under SQL code which is used for creating desk “Employee_Table” in Schema which we created earlier

Creating Employee Table - 3.JPG

Consult with under display shot which is used for inserting values into desk which we created simply now

Inserting into Employee table - 4.JPG

Proper Click on on desk and choose open content material, you will note the entries into desk simply now

Employee Table open content - 5.JPG

Now lets create second desk “Booking_Details”, consult with under code for creating desk and inserting values

Creating Booking table - 6.JPG

Proper Click on on the desk simply created and choose open content material, this may show entries which we inserted in earlier step

Content of Booking table - 7.JPG

Lets begin with Joins now as we’ve Schema and two tables created

Inside Be part of –

Inside Be part of selects the set of information that match in each the tables

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Inner Join Diagram - 8.JPG

SQL Code

SELECT A2.“Booking_ID”, A1.“Employee_ID”, A1.“Employee_Name”, A2.“Product_ID”, A2.“Total_Units”

FROM “Employee_Table” AS A1

INNER JOIN “Booking_Details” AS A2

Inner Join HANA - 9.JPG

Left Outer Be part of –

The Left Outer Be part of selects the entire set of information from first desk , with the matching information (the place obtainable) in second desk . If there is no such thing as a match, the proper aspect will comprise null

Left Outer Join Diagram - 10.JPG

SQL Code –

SELECT A2.“Booking_ID”, A1.“Employee_ID”, A1.“Employee_Name”, A2.“Product_ID”, A2.“Total_Units”

FROM “Employee_Table” AS A1

LEFT OUTER JOIN “Booking_Details” AS A2

ON A1.“Employee_ID” = A2.“Employee_ID”

Left Outer Join SQL - 11.JPG

Proper Outer Be part of –

The Proper Outer Be part of selects the entire set of information from second desk , with the matching information (the place obtainable) in first desk . If there is no such thing as a match, the left aspect will comprise null.

Right Outer Join Diagram - 12.JPG

SQL Code-

SELECT A2.“Booking_ID”, A1.“Employee_ID”, A1.“Employee_Name”, A2.“Product_ID”, A2.“Total_Units”

FROM “Employee_Table” AS A1

RIGHT OUTER JOIN “Booking_Details” AS A2

ON A1.“Employee_ID” = A2.“Employee_ID”

Right Outer Join SQL - 13.JPG

FULL OUTER JOIN –

The INNER JOIN selects the set of information that match in each the Tables.

Full Outer Join Diagram - 14.JPG

SQL Code –

SELECT A2.“Booking_ID”, A1.“Employee_ID”, A1.“Employee_Name”, A2.“Product_ID”, A2.“Total_Units”

FROM “Employee_Table” AS A1

FULL OUTER JOIN “Booking_Details” AS A2

ON A1.“Employee_ID” = A2.“Employee_ID”;

Full Outer Join SQL - 15.JPG

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