In this chapter, you will learn about recursion and why it is beneficial to apply this technique.  You will also refresh your knowledge about Common Expression Tables (CTE).

Ulasan Common Table Expressions (CTE)

Apa itu CTE?

Sebuah CTE untuk posisi TI

CTE untuk posisi TI bergaji tinggi

Pengenalan rekursi

Fakta tentang rekursi

Hitung faktorial dari 5

Cara mengkueri faktorial dari 6 secara rekursif

Menyelesaikan masalah matematika rekursif

Menghitung angka secara rekursif

Hitung jumlah pangkat

Recursion and Common Table Expression (CTE)

In this chapter, you will learn about recursive CTEs,  how to query hierarchical datasets,  and finally, how to apply recursive CTEs on hierarchical data.

Introduction to recursive CTE

Right or wrong?

Create the alphabet recursively

Create a time series of a year

Working with recursive queries

Who is your manager?

Get the hierarchy position

Which supervisor do I have?

Analyze the family tree

Get the number of generations?

Get all possible parents in one field?

Hierarchical and Recursive Queries

In this chapter, you will learn how to create and modify database tables. You will learn about relational and hierarchical data models, how they differ, and when each model should be used.

How to work with tables

Creating a table

Inserting and updating a table

Deleting data and dropping table

Changing a table structure

Working with relational data models

Defining primary and foreign keys

Inserting data to person and order history

Getting the number of orders & total costs

Working with hierarchical data models

Creating a hierarchical data model

Networked and hierarchical models

Creating a networked data model

Creating Data Models on Your Own

In this chapter, you will practice your learnings about hierarchical and recursive querying on real-world problems, such as finding possible flight routes, assembling a car, and modeling a power grid.

Travel planning for flight data

Get the anchor & recursive member

Get all possible airports

All flight routes from Vienna

How to assemble a car?

Create the parts list

Create a car's bill of material

Build up a BMW?

Modeling a power grid

Create a power grid

Get power lines to maintain

Summary of the course

Hierarchical Queries of Real-World Examples

Power grid data

Employee data

Department data

Salary data

Bill of materials products data

Bill of materials data

Flights data

Apakah Anda ingin mengueri struktur data yang kompleks secara iteratif? Apakah Anda memiliki akses ke struktur data hierarkis yang perlu dikueri? Kursus ini akan mengajarkan alat yang diperlukan untuk menjawab pertanyaan-pertanyaan tersebut. Anda akan mempelajari cara menulis kueri rekursif dan mengueri struktur data hierarkis. Untuk melakukannya, Anda akan menggunakan Common Table Expressions (CTE) dan prinsip rekursi pada berbagai himpunan data. Misalnya, Anda akan menelusuri himpunan data rencana penerbangan dan mempelajari cara menemukan koneksi terbaik dan termurah antara dua bandara. Setelah menyelesaikan kursus ini, Anda akan memahami prinsip rekursi, serta mampu mengidentifikasi dan membuat model data hierarkis.

Functions for Manipulating Data in SQL Server

Pelajari cara menulis kueri rekursif dan kueri struktur data hierarkis dengan CTE dan prinsip rekursi.

Kueri Hierarkis dan Rekursif di SQL Server

Pelajari cara menulis kueri rekursif dan mengakses struktur data hierarkis.

Fakta tentang rekursi

Kueri Hierarkis dan Rekursif di SQL Server

Latihan interaktif praktis