Difference between FACT and DIMENSION in Data Warehousing | dimensional modelling in data warehouse
Ғылым және технология
#etlqalabs #datawarehousingconcept #etltesting
In this session - we will understand what is difference between fact and dimension in data warehousing . Also in detail explanation about fact and dimension tables.
Пікірлер: 32
Thanks a lot sir. Wonderful explanation!
thank you sir, well explained
Thank you for the information sir
first of all thank you so much sir for this usefull video. please make 1 video on snowflake schema in a similar way.
Sir as a etl tester we should check both dimension tables and fact tables with source data or only we have to check fact tables with source data? Please reply
Hii sir thanks for all information .plese explain only flat file validation topic
In the Last query near end of video , why is 'JOIN' not being used ? Isnt that incorrect?
Hello sir I have been watching your videos ....this is helping me a lot to understand ETL...is there any chance to talk to you?
Hi sir, very informative video. I know u sir we were working in Business One technologies.
@etlqalabs5048
2 жыл бұрын
Hey Prateek, Good to see you here. Keep learning and keep sharing
@prateekchokkara3997
2 жыл бұрын
@@etlqalabs5048 Thanku sir.
if number of rows r more in fact table then dimension why it's called vertical table it shld be horizontal??
Sir can you provide PDF notes along with vedio
Hi sir, this 4 videos in datawarehouse playlist covers all data warehouse concepts or any additionally need to learn after this 4 videos to cover all datawarehouse concept
@etlqalabs5048
2 жыл бұрын
Hi Waseem , These are foundation videos to begin , I will add more to the list when time permits
@waseemAkram-qc2vm
2 жыл бұрын
@@etlqalabs5048 thank you so much sir it's helps alot for new learns
Hi sir What is the difference between Data warehousing testing Database testing ETL testing Is the above all 3 comes under functional testing?
@etlqalabs5048
2 жыл бұрын
Please Watch recent upload for these questions
share the file as well
which tables are loaded first fact or dimension and why ?
@etlqalabs5048
2 жыл бұрын
Dimension table is loaded first and then fact . The reason behind is fact table contents foreign key from fact table which is primary key in dimension table and due to referential integrity we need to load the table with primary key and then then table containing foreign key to avoid data load rejection. Hope this helps
@DeepakKumar-sh6hl
2 жыл бұрын
@@etlqalabs5048 thankyou so much for answering
What is top down approach and bottom apprach
@etlqalabs5048
2 жыл бұрын
Top down and bottom up are data warehouse design method , it's part of data warehousing concept. Let me explain you a bit here 1) Top down approach- data warehouse is built first and then specific datamarts are build E.g company ( Data warehouse) then then each department in company like sales , HR, Marketting etc can be considered as datamarts However In Bottom up approach , datamarts are deisgned first and then data warehouse , you can consider the same example for data warehouse and datamarts as in top down approach, hope this is clear
@pmk_full_facts_3224
2 жыл бұрын
Yes cleared bro.
@pmk_full_facts_3224
2 жыл бұрын
Thank you soo much
@kopurirajesh1347
2 жыл бұрын
How we can do validation testing in dimensional table?
Sir, can you please do video on real time project?
@etlqalabs5048
2 жыл бұрын
Sorry , please eloborate your request so I can understand on what topic do you need me to do video ? If you are looking for real time scenarios in ETL Testing, do watch ETL Testing be playlist
@vinodkolar2190
2 жыл бұрын
@@etlqalabs5048 real time project on ETL testing
@etlqalabs5048
2 жыл бұрын
@@vinodkolar2190 great then please watch my ETL Testing playlsit on this channel itself, hope you will find good stuff
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