Le data engineer est un professionnel de l’informatique présent dans presque tous les secteurs. Il/Elle suit l’évolution et les tendances des données pour orienter les stratégies futures de l’entreprise. Une part essentielle de son travail consiste à transformer des données brutes en données exploitables en créant des pipelines et des systèmes de données.
2) create daily revenue report between given start_date and end_date output schema: (order_date, number_of_customers, number_of_orders, daily_total_order_amount, mtd_order_amount) mtd_order_amount - total order_amt from the beginning of the month till order_date
List the strings that are anagrams from a set of strings?
A lot of SQL questions. General knowledge about how you would handle large amounts of data.
Calculating percentage of sales percentage of non dat and regular products Calculating percentage of sales that matched the start date and end date of the promotion Fill the none values in a list with the previous non none value
try to get a pattern out of string or json. ask you to translate numbers from 1 to 100 to names of numbers ( for example 34 translated to thirty-four). you need to come with a solution within 10 seconds, I am able to get it done within 2 minutes. That's not fast enough.
all question were just basic but sometimes the basic questions can be tricky like why we use main function in java ? why it is public? run program without main?
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Write a query to retrieve duplicate records from a table?
What is 4 post in the data center?
Difference between delete and truncate in SQL?
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