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Hope this post finds you in good health and spirit.

Structured Query Language, abbreviated as SQL, is a domain-specific language used in programming and designed for managing data held in a relational database management system, or for stream processing in a relational data stream management system.

An good developer must be familiar with a few commands in SQL because it is such a strong development tool. The SQL queries listed below are important for coding and optimization. Almost every system that interacts with a SQL database will be affected by each query in the SQL tutorial.

Top- N queries

Top-N queries give a process for restricting the number of rows delivered from organized assemblages of data. They are remarkably beneficial when users want to give the top or bottom number of rows from a table. For example, the following query gives the 20 rows with 10 different values:

SELECT price
FROM sales_order
ORDER BY price;

PRICE
----------
100
100
200
200
300
300
400
400
500
500
600

PRICE
----------
600
700
700
800
800
900
900
1000
1000
20 rows selected.

So, that’s all in this blog. I will meet you soon with next stuff .Have a nice day !!!

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