COUNT
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What is COUNT?
COUNT is an SQL aggregate function that returns the number of rows that match the specified criteria. It can be used to count all rows in a table, non-null values in a specific column, or rows that meet certain conditions when combined with a WHERE clause. COUNT is often used in data analysis, reporting, and performance optimization queries to determine the size of datasets or the frequency of particular values.
Free resources to learn COUNT
- ArticleThe SQL COUNT() Function
More in stage 5: Aggregate Queries
COUNT: common questions
Can I learn COUNT in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain COUNT in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this COUNT tutorial for beginners?
It is lesson 17 of 112 in the free SQL roadmap, in stage 5, Aggregate Queries. If you are new to SQL, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.