SQL is very easy to learn, but lots of hands-on experience is required to master to perform the below tasks.
1) Translating any business requirements into SQL.
2) Writing efficient, readable & maintainable SQL.
3) Breaking down &
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800+ Java & Big Data Interview Q&As
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00: 50+ SQL scenarios based interview Q&As on identifying & deleting duplicate records
50+ SQL interview questions and answers to solve real business scenarios. SQL is widely used in building microservices & Big Data projects. Learning SQL syntax is easy, but being able to convert a given business requirement into a query takes lots of practice. These scenarios based interview questions can assesses your experience.
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02: 50+ SQL scenarios based interview Q&As on joins, CDC and recursive CTE
This extends 50+ SQL scenarios based interview questions answered on identifying & deleting duplicate records. You can practice these in SQLs by setting up the data on db-fiddle MySQL V8.0 or a database server & SQL client of your choice. Q01 When you have a table that maintains history of...
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15+ SQL optimisation interview questions & answers with scenarios
1) Select fields instead of using SELECT *. The “*” is used as a short hand to query all available data from a table. If a table has many fields and rows, this takes database resources by querying a lot of unnecessary data. … Read more ›...
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25+ SQL interview questions & answers – beginner
SQL interview Questions & Answers is a must for any developer as all non-trivial applications need to talk to a database with CRUD operations. Q3 – Q15 are very popular with the interviewers. If you want to quickly practice your SQL skills try DB Fiddle or install MySQL locally as...
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25+ SQL interview questions & answers – intermediate to experienced
This continues 25+ SQL interview questions & answers – beginner
Q16. Why do you have CASE statements in SQL?
A16. CASE statements in SQL are similar to IF and ELSE conditions in programming languages. CASE statements are used to fetch particular values based on certain conditions.
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