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MIDDLE

Middle Data Engineer | SQL, MongoDB | Customer Data

Contains following tasks:

1) Choice questions - assessing knowledge of SQL, MongoDB, NoSQL

2) Code gaps - assessing knowledge of Mongo, MongoDB

3) Task [level: Medium] - SQL | Customer Data - Find all the customers whose first and last names are not unique in this database, as well as the number of times each first and last name pair appears in the database.

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Tasks details:

SQL exercise

middle level
Skills: SQL MSSQL oracle PostgreSQL HSQLDB MySQL

SQL | Customer Data

Code gaps

middle level
Skills: MongoDB Mongo

Mongo | Query | Update with the Lowest Value

Code gaps

middle level
Skills: MongoDB Mongo

Mongo | Query | Number of Elements in Array

Code gaps

middle level
Skills: MongoDB Mongo

Mongo | Query | Multiply Values

Choice questions

middle level
Skills: MongoDB NoSQL SQL

5 choice questions

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