# Personal Career & Learning Guide for Data Analyst, Data Engineer and Data Scientist

As a data analyst, you often need to work with large datasets to find important insights and make informed decisions. One of the most common tasks you’ll face is counting and aggregating data in a meaningful way. This is where Microsoft Excel can come in handy, as it provides a wide range of functions and formulas that you can use to manipulate and analyze data.

One example of a task you might encounter is counting the number of rows in a dataset that meet certain criteria. For instance, you might want to know how many items were sold and how many remain unsold. This is where the COUNTIF and SUMIF functions come in. These functions allow you to count or sum values in a range based on specified criteria.

To count the number of rows with OR logic, you can use the COUNTIF formula. The formula is as follows:

=COUNTIF(range, criteria1) + COUNTIF(range, criteria2) + …

The “range” argument refers to the cells you want to count, and the “criteria” argument is the value you’re looking for. In this case, you can use the OR operator to specify multiple criteria. For example, if you want to count the number of rows where the value in column A is either “Sold” or “Unsold”, you can use the following formula:

=COUNTIF(A1:A10, “Sold”) + COUNTIF(A1:A10, “Unsold”)

This formula will count the number of rows in the range A1:A10 where the value in column A is either “Sold” or “Unsold”. The result of the formula will give you the total number of rows that meet the specified criteria.

To count the number of sold and remaining items, you can use the SUMIF function. The formula is as follows:

=SUMIF(range, criteria, sum_range)

The “range” argument refers to the cells you want to count, the “criteria” argument is the value you’re looking for, and the “sum_range” argument is the range of cells you want to sum. For example, if you have a column with the status of each item (sold or unsold) in column A and a column with the quantity of each item in column B, you can use the following formula to count the number of sold items:

=SUMIF(A1:A10, “Sold”, B1:B10)

This formula will count the number of rows in the range A1:A10 where the value in column A is “Sold”, and sum the corresponding values in column B. The result of the formula will give you the total number of sold items.

You can use similar logic to count the number of unsold items, simply by changing the criteria in the formula.

By using these functions and formulas, you can quickly and easily analyze and manipulate large datasets in Excel. Whether you’re counting the number of rows with specific criteria or aggregating data based on certain conditions, these tools will help you get the insights you need to make informed decisions.

# Excel Example for Data Analyst – Count sold and remaining

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