What does the GROUP BY clause in SQL achieve?Sorts data in ascending or descending order.Groups rows based on a specified column, allowing for aggregate functions.pen_sparkFilters rows based on a specific condition.Selects specific columns from a table.

The GROUP BY clause in SQL is used to group rows that have the same values in specified columns into aggregated data. It is often used with aggregate functions (COUNT, MAX, MIN, SUM, AVG) to group the result-set by one or more columns.

Here's a step-by-step breakdown of what it does:

1. Groups the data based on the columns that are specified after the GROUP BY clause. The columns are separated by commas.

2. Once the data is grouped, it allows aggregate functions to be performed on the grouped data. Aggregate functions are functions where the values of multiple rows are grouped together as input on certain criteria to form a single value of more significant meaning or measurement such as a set, a bag or a list.

3. The result of the query with a GROUP BY clause does not include any rows where the column or columns that are included in the clause are NULL.

4. The GROUP BY clause can be used in a SELECT statement, UPDATE, INSERT, or DELETE statement.

5. The data that is grouped together can be filtered using the HAVING clause of the SQL statement.

So, in summary, the GROUP BY clause is used to divide the data into groups that have matching values in specified columns. Once the data is divided into groups, you can perform operations on each of them separately.

The GROUP BY clause in SQL is used to arrange identical data into groups. This clause follows the WHERE clause in a SELECT statement and precedes the ORDER BY clause.

Here's a step-by-step breakdown of what it does:

1. Groups the rows that have the same values in specified columns into aggregated data, like sum, average, or count.

2. Allows you to use aggregate functions like COUNT, SUM, AVG, MAX, or MIN to get more information about each group of data.

3. It can be used in conjunction with the SELECT statement to collect data across multiple records and group the results by one or more columns.

It's important to note that the GROUP BY clause does not order the data. The ORDER BY clause is used to sort the data in ascending or descending order. The WHERE clause is used to filter rows based on a specific condition, and the SELECT statement is used to select specific columns from a table.