WHERE clause for filtering in Google Sheets - Step-by-Step Guide

Introduction

Filtering data helps you see only the rows you want based on conditions. In Google Sheets, you can use the FILTER function to show rows that meet specific criteria, similar to a WHERE clause in databases.

When you want to see only sales records from a specific region in your sheet.

When you need to list employees who joined after a certain date.

When you want to extract products with prices above a certain amount.

When you want to create a summary table showing only active customers.

When you want to filter survey responses that meet a particular answer.

Steps

Step 1: Click

- an empty cell where you want the filtered results to appear

The cell is selected and ready for input

Step 2: Type

- the formula bar

You start entering the FILTER formula

💡 Start with =FILTER(

Step 3: Enter

- the range of data you want to filter inside the formula

The formula now knows which data to check

💡 Example: A2:C20

Step 4: Type

- the condition for filtering after a comma in the formula

The formula filters rows that meet this condition

💡 Example: B2:B20="East" filters rows where column B is East

Step 5: Close

- the formula with a parenthesis and press Enter

The filtered data appears in the selected cell and below

Before vs After

Before

Sheet shows all sales data from all regions in rows 2 to 20

After

Sheet shows only rows where the region column says East, starting from the selected cell

Settings Reference

FILTER function

📍 Formula bar

To show only rows that meet the given condition(s)

Default: No default, must specify range and condition

Common Mistakes

Using FILTER without specifying the condition range correctly

The formula may return an error or wrong results if ranges do not match in size

Make sure the condition range matches the size of the data range exactly

Forgetting to close the FILTER formula with a parenthesis

The formula will not calculate and show an error

Always end the formula with a closing parenthesis )

Summary

FILTER function in Google Sheets works like a WHERE clause to show rows that meet conditions.

You must specify the data range and the condition range with the condition inside FILTER.

Make sure ranges match in size and close the formula properly to avoid errors.

Practice

1. What does the WHERE clause do in a Google Sheets QUERY function?

easy

A. It sorts the data alphabetically.

B. It filters rows based on a condition.

C. It adds new columns to the data.

D. It changes the data format.

Solution

1. Step 1: Understand the purpose of WHERE clause

   The WHERE clause is used to select only rows that meet a specific condition.

2. Step 2: Compare options with WHERE clause function

   Sorting, adding columns, or changing format are not done by WHERE; filtering rows is correct.

3. Final Answer:

   It filters rows based on a condition. -> Option B

4. Quick Check:

   WHERE clause = filters rows [OK]

Hint: WHERE filters rows by condition inside QUERY [OK]

Common Mistakes:

• Confusing WHERE with sorting or formatting
• Thinking WHERE adds columns
• Assuming WHERE changes data types

2. Which of the following is the correct syntax to filter rows where column A equals 100 in a QUERY function?

easy

A. SELECT * WHERE A = 100

B. SELECT * WHERE A == 100

C. SELECT * WHERE A equals 100

D. SELECT * WHERE A := 100

Solution

1. Step 1: Recall QUERY syntax for equality

   In QUERY, single equals sign (=) is used to compare values.

2. Step 2: Check each option's syntax

   A uses word 'equals', invalid; B uses '==', invalid; C uses '=', correct; D uses ':=', invalid in QUERY.

3. Final Answer:

   SELECT * WHERE A = 100 -> Option A

4. Quick Check:

   Use '=' for equality in WHERE [OK]

Hint: Use single '=' for equality in QUERY WHERE [OK]

Common Mistakes:

• Using '==' instead of '='
• Writing 'equals' as word
• Using ':=' or other operators

3. Given this QUERY: =QUERY(A1:C5, "SELECT A, B WHERE C > 50") and data:
A=Name, B=Score, C=Age
Rows:
1: John, 80, 45
2: Mary, 90, 55
3: Alex, 70, 60
4: Lisa, 85, 40
What rows will the query return?

medium

A. Mary and Alex

B. No rows

C. All rows

D. John and Lisa

Solution

1. Step 1: Understand the WHERE condition

   The query filters rows where column C (Age) is greater than 50.

2. Step 2: Check each row's Age value

   John (45) and Lisa (40) are not >50; Mary (55) and Alex (60) are >50, so only Mary and Alex are included.

3. Final Answer:

   Mary and Alex -> Option A

4. Quick Check:

   Filter C > 50 returns Mary, Alex [OK]

Hint: Check numeric condition on column values carefully [OK]

Common Mistakes:

• Including rows with C ≤ 50
• Confusing column letters
• Assuming all rows return

4. What is wrong with this QUERY formula? =QUERY(A1:B10, "SELECT A, B WHERE B > 20 AND")

medium

A. SELECT must include C column

B. Incorrect column letters

C. WHERE clause cannot use AND

D. Missing condition after AND

Solution

1. Step 1: Analyze the WHERE clause syntax

   The WHERE clause ends with 'AND' but no condition follows, which is invalid syntax.

2. Step 2: Check other options

   Column letters A and B are valid; AND is allowed but must be followed by a condition; SELECT does not require column C.

3. Final Answer:

   Missing condition after AND -> Option D

4. Quick Check:

   AND must have conditions on both sides [OK]

Hint: Ensure AND has conditions on both sides [OK]

Common Mistakes:

• Leaving AND at end without condition
• Misnaming columns
• Thinking AND is not allowed

5. You want to filter rows where column B contains the text 'apple' (case insensitive) using QUERY. Which WHERE clause is correct?

hard

A. WHERE lower(B) = 'apple'

B. WHERE B contains 'apple'

C. WHERE lower(B) contains 'apple'

D. WHERE B = 'apple'

Solution

1. Step 1: Understand case-insensitive text filtering

   To ignore case, convert text to lowercase using lower(), then check if it contains 'apple'.

2. Step 2: Evaluate each option

   A uses equality after lower() for exact match only; C uses contains without lower(), case-sensitive; D is case-sensitive exact equality; B uses lower() with contains correctly for case-insensitive partial match.

3. Final Answer:

   WHERE lower(B) contains 'apple' -> Option C

4. Quick Check:

   Use lower() with contains for case-insensitive filter [OK]

Hint: Use lower() with contains for case-insensitive text filter [OK]

Common Mistakes:

• Using = instead of contains for partial match
• Ignoring case sensitivity
• Using contains without lower()