# 9 American Equity SQL Interview Questions (Updated 2024)

Updated on

August 11, 2024

Data Analytics, Data Science, and Data Engineering employees at American Equity uses SQL for analyzing customer data trends, such as tracking policyholder demographics and behavior. It is also used for managing financial asset data, including optimizing investment portfolios and reducing financial risk, which is why American Equity asks prospective hires SQL coding interview questions.

So, to help you study, we've collected 9 American Equity Investment Life Holding SQL interview questions – can you solve them?

## 9 American Equity Investment Life Holding SQL Interview Questions

### SQL Question 1: Identify VIP Customers for American Equity

American Equity is a financial services company that gives out home mortgages, and part of your job is to identify the "whale" customers, i.e. those that take large loans frequently.

Given a table with the following schema:

##### Example Input:
loan_iduser_idloan_dateloan_amount
135956703/08/2019450000
246734703/05/2021500000
258943703/20/2021600000
347556704/12/2021500000
457897807/15/2021400000

Write a SQL query that would return the , and total loan amount and count of loans for each user, sorted by total loan amount in descending order, for users that have borrowed more than $1 million in total over at least 2 different instances. Your result should look like this: ##### Example Output: user_idtotal_loan_amountloan_count 5679500002 3475000001 #### Answer: Here is a PostgreSQL query that would solve this: This query groups the loans by , then sums and counts how many loans each user has taken. The clause excludes users that have taken loans adding up to less than$1 million or have less than two loans. Finally, the results are ordered by in descending order to prioritize the biggest borrowers.

To practice a related customer analytics question on DataLemur's free interactive SQL code editor, try this Microsoft Azure Cloud SQL Interview Question:

### SQL Question 2: Department vs. Company Salary

You're given a table of American Equity employee and department salary information. Write a SQL query to find departments where the departments average salary is higher than the company's average salary.

Solve this question directly within the browser on DataLemur:

The answer is LONG – 30+ lines of SQL. You can find a step-by-step solution here: Department vs. Company Salary.

### SQL Question 3: What does the SQL keyword do?

If you want to return records with no duplicates, you can use the keyword in your statement.

For example, if you had a table of American Equity employees, and wanted to see what are all the unique job titles that currently worked at the company, you could write the following query:

f_namejob_title
AkashData Analyst
BrittanyData Scientist
CarlosData Engineer
DiegoData Engineer

Then the output from the query would be:

job_title
Data Analyst
Data Scientist
Data Engineer

### SQL Question 4: Policy Analysis With Window Functions

American Equity sells annuity policies. Each policy has a , , , and . We would like to know for every what is the total amount of policies they purchased over each year and rank their annual total purchase from highest to the lowest.

For example, if John Doe purchased $1000 policy in January 2021,$2000 in June 2021, $3000 in January 2022, then total purchase for John Doe in 2021 would be$3000, and \$3000 in 2022. And the rank for 2021 would be 2 and for 2022 would be 1.

##### Example Input:
purchase_datepolicy_numberclient_idpurchase_amount
01/01/202146511081000
06/01/202165431082000
01/01/202256431083000
07/01/202198652055000
08/01/202287652052000
##### Example Output:
client_idyeartotal_purchasepurchase_rank
108202130002
108202230001
205202150002
205202220001

This query first groups rows by and year of , and sums up for each group. Then it uses window function to rank these sums within each . The ranking order is descending by the total purchase amount, meaning that the higher the total purchase, the higher the rank. The clause at the end is to sort the result by and .

p.s. Window functions show up super frequently during SQL interviews, so practice the 27+ window function questions on DataLemur

### SQL Question 5: Can you define what a database index is, and give some examples of different types of indexes?

A database index is a data structure that improves the speed of data retrieval operations on a database table.

There are few different types of indexes that can be used in a database:

• Primary index: a unique identifier is used to access the row directly.
• Unique index: used to enforce the uniqueness of the indexed columns in a table.
• Composite index: created on multiple columns of a table, is used to speed up the search process for multiple columns
• Clustered index: determines the physical order of the data in a table

For a concrete example, say you had a table of American Equity customer payments with the following columns:

Here's what a clustered index on the column would look like:

A clustered index on the column would determine the physical order of the records in the table based on the . This means that the records with the earliest values would be stored together physically in the table, followed by records with later payment_date values. This speeds up queries that filter or sort the data based on the , as the records are already physically sorted in the table. For example, if you want to retrieve all the payments made in the month of June, the database can use the clustered index to quickly locate and retrieve the desired records without having to search through the entire table.

### SQL Question 6: Portfolio Performance Analysis

American Equity is a company that offers annuities and life insurance products. We'll simulate a situation where they want to analyze the performance of their financial products (annuities) based on the average returns and the amount of investment made in each product. They have two tables, named and .

The table includes information about each product such as , and .

The table contains investment transactions providing , , , and .

You need to write an SQL query that would help American Equity to find the average per product, listing the and the in the final output.

##### Example Input:
product_idproduct_nameproduct_type
1Fixed AnnuityAnnuity
2Indexed AnnuityAnnuity
3Survivorship LifeLife Insurance
4Indexed Survivorship LifeLife Insurance
##### Example Input:
investment_idproduct_idinvestor_idinvestment_dateinvestment_amount
101150102020-09-235000
102250112020-12-117000
103150102021-01-206000
104250122021-04-028000
105150112021-07-145500

SQL code:

This query first joins table and table on . Then it groups the result by and evaluates the average for each group, i.e., for each . The final output will contain and their respective .

### SQL Question 7: What are the differences between an inner and a full outer join?

A full outer join returns all rows from both tables, including any unmatched rows, whereas an inner join only returns rows that match the join condition between the two tables.

For an example of each one, say you had sales data exported from American Equity's Salesforce CRM stored in a datawarehouse which had two tables: and .

: retrieves rows from both tables where there is a match in the shared key or keys.

This query will return rows from the sales and tables that have matching customer id values. Only rows with matching values will be included in the results.

: retrieves all rows from both tables, regardless of whether there is a match in the shared key or keys. If there is no match, NULL values will be returned for the columns of the non-matching table.

Here is an example of a SQL full outer join using the sales and tables:

### SQL Question 8: Calculate the Average Monthly Insurance Premium

American Equity is an insurance company that sells various types of policies to its customers. Each policy has a regular premium paid by the customer. For the data analysis department, write a SQL query to calculate the average monthly premium received from customers for each type of insurance policy sold by the company.

100186701/03/2022Home1100
100230202/12/2022Car900
100386703/08/2022Life1200
10044402/29/2022Car950
10054404/16/2022Health800
##### Expected Output:
2022-01Home1100.00
2022-02Car925.00
2022-03Life1200.00
2022-04Health800.00

Here is a SQL query that meets the requirements, written for PostgreSQL:

This query groups the insurance premiums by the month of policy start date and insurance type to yield the average premium per month. This will help the data analysis team to track the average monthly revenue from each type of insurance policy. The use of function extracts the year and the month from the date column, and calculates the average premium.

### SQL Question 9: Filtering Customer records using Like Keyword

As a database administrator for the company American Equity, your task is to retrieve the customer records for those customers who have similiar names. The marketing department decided to create personalized marketing strategies based on these groups and parts of the name can be used as a grouping basis. They ask you to find all customer records where the customer's name begins with 'Rob'.

Here is an example customer records data:

##### Example Input:
customer_idfirst_namelast_nameemailsignup_date
301RobertSmithrobertsmith@example.com01/22/2021
302RobinJohnsonrobinjohnson@example.com03/10/2021
303JamesMartinjamesmartin@example.com04/17/2021
304RobertoGarciarobertogarcia@example.com06/27/2021
305JenniferBrownjenniferbrown@example.com03/15/2021

We want to get a table that contains the following columns: , , , and .

##### Example Output:
customer_idfirst_namelast_nameemail
301RobertSmithrobertsmith@example.com
302RobinJohnsonrobinjohnson@example.com
304RobertoGarciarobertogarcia@example.com

You can use the following PostgreSQL query to achieve this:

The will match any customer record where the begins with 'Rob'. The percentage symbol '%' is a wildcard that will match any sequence of characters (including no characters). In this case, the query will return all customer records where begins with 'Rob'.

### Preparing For The American Equity SQL Interview

The best way to prepare for a SQL interview, besides making sure you have strong SQL fundamentals, is to practice a ton of real SQL questions that were asked in recent job interviews. Besides solving the above American Equity SQL interview questions, you should also solve the 200+ SQL questions from real Data Science & Analytics interviews which come from companies like FAANG tech companies and tech startups.

Each exercise has hints to guide you, step-by-step solutions and best of all, there's an interactive SQL code editor so you can right online code up your SQL query and have it checked.

To prep for the American Equity SQL interview it is also a great idea to solve SQL problems from other insurance companies like:

Keep up with American Equity's latest news and announcements, driving growth and innovation in the industry!

However, if your SQL skills are weak, don't worry about going right into solving questions – refresh your SQL knowledge with this interactive SQL tutorial.

This tutorial covers SQL concepts such as filtering groups with HAVING and sorting data with ORDER BY – both of these pop up routinely during American Equity SQL assessments.

### American Equity Investment Life Holding Data Science Interview Tips

#### What Do American Equity Data Science Interviews Cover?

In addition to SQL interview questions, the other types of questions to prepare for the American Equity Data Science Interview are:

#### How To Prepare for American Equity Data Science Interviews?

To prepare for the American Equity Data Science interview make sure you have a deep understanding of the company's cultural values – this will be clutch for acing the behavioral interview. For the technical Data Science interviews, prepare by reading Ace the Data Science Interview. The book's got:

• 201 Interview Questions from FAANG (FB, Apple, Amazon, Netflix, Google)
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