select count(distinct city) from personal; // distinct :- is remove the duplicate value and showing the single value for example we have a 3 value with same name so ...
Aggregate functions in SQL are used to perform calculations on multiple rows of a table and return a single summarized value. They are mainly used to analyze and summarize data in databases. 🔹 Types ...
Abstract: Aggregation functions such as COUNT, SUM, AVG, MAX, and MIN are basic tools for summarizing data in SQL. However, their behavior can be affected by several factors such as the occurrence of ...
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