Souy Soeng

SQL INTERSECT The INTERSECT operator in SQL returns the common rows (intersection) between two or more SELECT queries. The output includes only row…

Understanding SQL HAVING The SQL HAVING clause is used to filter groups of data after aggregation. Unlike the WHERE clause, which filters rows befo…

SQL GROUPING SETS SQL GROUPING SETS The GROUPING SETS clause in SQL allows you to create multiple groupings in a single query, making it easier to…

SQL GROUP BY The GROUP BY statement in SQL is used to arrange identical data into groups. It is typically used with aggregate functions (like COUNT …

Understanding the SQL MAX() Function The MAX() function in SQL is an aggregate function used to retrieve the largest value in a column. It is benef…

Understanding SQL COUNT The SQL COUNT function is an aggregate function that returns the total number of rows in a table or the number of rows that …

What is SQL SUM()? The SUM() function in SQL calculates the total sum of a numeric column. It is one of the aggregate functions in SQL and is often …

What is SQL MIN()? The MIN() function in SQL is an aggregate function that returns the smallest (minimum) value from a specified column. It is commo…

What is SQL AVG()? The AVG() function in SQL is used to calculate the average (mean) value of a numeric column. It is a part of SQL's aggregate …

Understanding SQL CROSS JOIN The SQL CROSS JOIN is a type of join that returns the Cartesian product of two tables. This means that it will combine …

Understanding SQL SELF JOIN A SQL SELF JOIN is a join operation where a table is joined with itself. This is useful when a table contains a hierarch…

What Are SQL Aggregate Functions? SQL aggregate functions perform calculations on a set of values and return a single value. These functions are comm…