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Let’s say we have a table with an <code>id</code> and <code>name</code> fields. The table holds over 100 million rows and we want to sample a random row in the table without throttling the database.

Write a query to randomly sample a row from this table.

Input:

<code>big_table</code> table

<table>
<thead>
<tr>
<th>Columns</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>name</code></td>
<td>VARCHAR</td>
</tr>
</tbody>
</table>

Write a query to randomly sample a row from a big table.

Random SQL Sample

Let’s say that your company is running a standard control and variant AB test on a feature to increase conversion rates on the landing page. The PM checks the results and finds a .04 p-value.

How would you assess the validity of the result?

Experiment Validity

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

What is a key disadvantage of the F-test when compared to multiple t-tests?

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

Spartannash Salaries by Position

At SpartanNash, we deliver the ingredients for a better life through customer-focused innovation. We do this for our supply chain customers and U.S. military commissaries, retail store guests and, most importantly, our Associates. In fact, we see a day when each will say, "I can't live without them." Our SpartanNash family of Associates is 17,500 strong, ranging from bakery managers to order selectors; from IT developers to vice presidents of finance; from HR Business Partners to export specialists. Each of them plays an integral role in SpartanNash's People First culture, Operational Excellence and Insights that Drive Solutions. Ready to contribute to the success of our food solutions company? Apply now Location: 850 76th Street S.W. - Byron Center, Michigan 49315 Job Description: Position Summary: This role is responsible to design and maintain enterprise databases that model data and optimize analytical databases. Document business requirements utilize modeling tools to build and analyze databases and develop the database design ensuring effective and optimal database solutions. Here's what you'll do: Designs or enhances systems, applications, functions, and procedures to solve complex problems and meet business objectives Application/System Troubleshooting interfaces with appropriate corporate area to provide detailed application/system information to assist with problem determination and resolution May be responsible for multiple phases of a project Participate in the on-call support rotation Additional responsibilities may be assigned as needed. Here's what you'll need: Bachelor's Degree (Required) in Computer Science Information Technology, Business Administration or related field or equivalent combination of education and/or experience. 3 years or less Information Technology experience in database modeling/relational database administration. Strong verbal and written communication skills. Must have strong organization, prioritization, analytical and problem-solving skills. Must be detail oriented, have good project/time management and strong data management and documentation skills. Technical knowledge and experience with programs and relevant database platforms including Oracle, DB2, SQL, DataStage, Talend, Snowflake As part of our People First culture, SpartanNash is proud to offer a robust and competitive Total Rewards benefits package. SpartanNash is an Equal Opportunity Employer, including disability and veteran, that celebrates diversity and believes employing a diverse workforce is key to our success. We are committed to providing equal employment opportunities to all individuals. We are not able to sponsor work visas for this position.

At SpartanNash, we deliver the ingredients for a better life through customer-focused innovation. We do this for our supply chain customers and U.S. military commissaries, retail store guests and, most importantly, our Associates. In fact, we see a day when each will say, "I can't live without them." Our SpartanNash family of Associates is 17,000 strong, ranging from bakery managers to order selectors; from IT developers to vice presidents of finance; from HR Business Partners to export specialists. Each of them plays an integral role in SpartanNash's People First culture, Operational Excellence and Insights that Drive Solutions. Ready to contribute to the success of our food solutions company? Apply now! Location: 850 76th Street S.W. - Byron Center, Michigan 49315 Job Description: Responsible to design and maintain enterprise databases that model data and optimize analytical databases. Document business requirements, utilize modeling tools to build and analyze databases, and develop the database design ensuring effective and optimal database solutions. Information Technology professional associates must have an understanding of potential vulnerabilities in systems and applications that they support and manage updates and fixes in accordance with internal security policies and standards. Systems should be managed to minimize and mitigate risks. IT Associates must work with other non-IT associates across different departments to ensure that security systems are working smoothly to reduce the organization's operational risks in the face of a security attack. Here's what you'll do: <ul><li>Lead the day-to-day activities of the computer support team; provide coaching, training and guidance on the use of equipment and software, and act as a primary point of contact to assist team members with complex incident resolution and ensure timely maintenance of procedural documentation for incident/problem resolution. </li><li>Ensure team logs all incidents into the Incident Management solution; track incident assignments to technical resources and/or vendors, communicate status updates and ensure timely resolution of incidents. </li><li>Maintain working relationships between customer(s) and IT to ensure desired level of service is maintained. </li><li>Oversee severity one incidents and communicate timely updates to IT Management and business partners. </li><li>Initiate escalation as appropriate to ensure management awareness of problems that are severe in nature or that are exceeding documented targets. </li><li>Maintain the Computer Support Center (CSC) schedule and participate on the on-call rotation responsibilities. </li><li>Identify and research trends and complex incidents and work with 2nd level Support teams to document and train CSC team members on changes and new procedures; work closely with CSC team management as needed. </li><li>Communicate call issues/resolution findings (i.e., call trends, new resolution techniques, etc.) to the team in a timely manner. </li><li>May be responsible to assist with responding to incoming requests, depending on volume, to include Respond to phone calls, emails, and voice mails and log incidents and provide resolution for level one and level two customer support; Perform restorative and maintenance actions either remotely or at the end-user's location to resolve end-users' incidents using troubleshooting and technical skills; and prioritize and handle multiple open incidents. </li><li>Participate on assigned project teams to determine the support centers needs for new products and systems. </li><li>Maintain confidentiality of Company and client information accessed through issue resolution/research. </li><li>Additional responsibilities may be assigned as needed. </li></ul>Here's what you'll need: <ul><li>Associate's Degree (Required) in Information Technology, Computer Science or related field or equivalent combination of education and/or experience. </li><li>Five years combined experience with Computer Support and/or Information Technology or related area. </li><li>Prior lead experience preferred. </li><li>Experience with retail and/or distribution technologies preferred. </li><li>HDI, A+, and/or ITIL certifications required </li><li>Strong written and verbal communication skills, and effective interpersonal skills to work with internal and external customers and vendors. </li><li>Ability to present ideas/resolution in a user-friendly language. </li><li>Strong customer focus, attention to detail, prioritizing, multi-tasking and organizational skills. </li><li>Good analytical/research and problem-solving skills. </li><li>In depth experience of tools used to assist customers and provide timely resolution. </li><li>Must be able to work effectively in a team environment and provide work direction and lead team in a deadline driven environment. </li><li>Must be self-motivated, resourceful, able to adapt to changes, and be flexible with changing priorities/technologies. </li><li>Experience with call management, incident resolution and escalation. </li><li>Technical writing ability to document incoming calls and procedures required. </li><li>Proficient typing skills. </li><li>Proficient in Microsoft Office and Windows. </li></ul> Physical Requirements: The physical demands described here are representative of those that must be met by an associate to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. May be required to lift and/or move 20 pounds. The associate is frequently required to sit/stand/walk. While performing the duties of this position, the associate is subject to a typical office environment and is rarely exposed to outside weather conditions. Temperatures may vary for those subject to any of the following areas: computer/server room, print shop, production area). The noise level in the work environment is usually low to moderate but may be high in distribution settings. Travel requirements vary by assignment. As part of our People First culture, SpartanNash is proud to offer a robust and competitive Total Rewards benefits package . SpartanNash is an Equal Opportunity Employer, including disability and veteran, that celebrates diversity and believes employing a diverse workforce is key to our success. We are committed to providing equal employment opportunities to all individuals. We are not able to sponsor work visas for this position. Already Applied?

At SpartanNash, we deliver the ingredients for a better life through customer-focused innovation. We do this for our supply chain customers and U.S. military commissaries, retail store guests and, most importantly, our Associates. In fact, we see a day when each will say, "I can't live without them." Our SpartanNash family of Associates is 17,000 strong, ranging from bakery managers to order selectors; from IT developers to vice presidents of finance; from HR Business Partners to export specialists. Each of them plays an integral role in SpartanNash's People First culture, Operational Excellence and Insights that Drive Solutions. Ready to contribute to the success of our food solutions company? Apply now! Location: 850 76th Street S.W. - Byron Center, Michigan 49315 Job Description: Responsible to design and maintain enterprise databases that model data and optimize analytical databases. Document business requirements, utilize modeling tools to build and analyze databases, and develop the database design ensuring effective and optimal database solutions. Information Technology professional associates must have an understanding of potential vulnerabilities in systems and applications that they support and manage updates and fixes in accordance with internal security policies and standards. Systems should be managed to minimize and mitigate risks. IT Associates must work with other non-IT associates across different departments to ensure that security systems are working smoothly to reduce the organization's operational risks in the face of a security attack. Here's what you'll do: <ul><li>Lead the day-to-day activities of the computer support team; provide coaching, training and guidance on the use of equipment and software, and act as a primary point of contact to assist team members with complex incident resolution and ensure timely maintenance of procedural documentation for incident/problem resolution.</li><li>Ensure team logs all incidents into the Incident Management solution; track incident assignments to technical resources and/or vendors, communicate status updates and ensure timely resolution of incidents.</li><li>Maintain working relationships between customer(s) and IT to ensure desired level of service is maintained.</li><li>Oversee severity one incidents and communicate timely updates to IT Management and business partners.</li><li>Initiate escalation as appropriate to ensure management awareness of problems that are severe in nature or that are exceeding documented targets.</li><li>Maintain the Computer Support Center (CSC) schedule and participate on the on-call rotation responsibilities.</li><li>Identify and research trends and complex incidents and work with 2nd level Support teams to document and train CSC team members on changes and new procedures; work closely with CSC team management as needed.</li><li>Communicate call issues/resolution findings (i.e., call trends, new resolution techniques, etc.) to the team in a timely manner.</li><li>May be responsible to assist with responding to incoming requests, depending on volume, to include Respond to phone calls, emails, and voice mails and log incidents and provide resolution for level one and level two customer support; Perform restorative and maintenance actions either remotely or at the end-user's location to resolve end-users' incidents using troubleshooting and technical skills; and prioritize and handle multiple open incidents.</li><li>Participate on assigned project teams to determine the support centers needs for new products and systems.</li><li>Maintain confidentiality of Company and client information accessed through issue resolution/research.</li><li>Additional responsibilities may be assigned as needed.</li></ul> Here's what you'll need: <ul><li>Associate's Degree (Required) in Information Technology, Computer Science or related field or equivalent combination of education and/or experience.</li><li>Five years combined experience with Computer Support and/or Information Technology or related area.</li><li>Prior lead experience preferred.</li><li>Experience with retail and/or distribution technologies preferred.</li><li>HDI, A+, and/or ITIL certifications required</li><li>Strong written and verbal communication skills, and effective interpersonal skills to work with internal and external customers and vendors.</li><li>Ability to present ideas/resolution in a user-friendly language.</li><li>Strong customer focus, attention to detail, prioritizing, multi-tasking and organizational skills.</li><li>Good analytical/research and problem-solving skills.</li><li>In depth experience of tools used to assist customers and provide timely resolution.</li><li>Must be able to work effectively in a team environment and provide work direction and lead team in a deadline driven environment.</li><li>Must be self-motivated, resourceful, able to adapt to changes, and be flexible with changing priorities/technologies.</li><li>Experience with call management, incident resolution and escalation.</li><li>Technical writing ability to document incoming calls and procedures required.</li><li>Proficient typing skills.</li><li>Proficient in Microsoft Office and Windows.</li></ul> Physical Requirements: The physical demands described here are representative of those that must be met by an associate to successfully perform the essential functions of this job. Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions. May be required to lift and/or move 20 pounds. The associate is frequently required to sit/stand/walk. While performing the duties of this position, the associate is subject to a typical office environment and is rarely exposed to outside weather conditions. Temperatures may vary for those subject to any of the following areas: computer/server room, print shop, production area). The noise level in the work environment is usually low to moderate but may be high in distribution settings. Travel requirements vary by assignment. As part of our People First culture, SpartanNash is proud to offer a robust and competitive Total Rewards benefits package . SpartanNash is an Equal Opportunity Employer, including disability and veteran, that celebrates diversity and believes employing a diverse workforce is key to our success. We are committed to providing equal employment opportunities to all individuals. We are not able to sponsor work visas for this position. Already Applied?

At SpartanNash, we deliver the ingredients for a better life through customer-focused innovation. We do this for our supply chain customers and U.S. military commissaries, retail store guests and, most importantly, our Associates. In fact, we see a day when each will say, "I can't live without them."Our SpartanNash family of Associates is 17,000 strong, ranging from bakery managers to order selectors; from IT developers to vice presidents of finance; from HR Business Partners to export specialists. Each of them plays an integral role in SpartanNash's People First culture, Operational Excellence and Insights that Drive Solutions. Ready to contribute to the success of our food solutions company? Apply now!Location:850 76th Street S.W. - Byron Center, Michigan 49315Job Description:Our Internship Program: SpartanNash offers paid internships to active students interested in careers within the grocery industry, in areas such as accounting/finance, graphic services, human resources, corporate affairs and communications, information technology, management, marketing and merchandising, supply chain, engineering, and more.As a Business Analyst, IT Corporate Applications Intern you will be part of SpartanNash's Internship Program. At SpartanNash, our Internship Program is designed to give exposure to the grocery and distribution industry, be engaging in real-world problem-solving, and be immersive in social and educational opportunities with other interns. The internship is a paid, full-time summer opportunity from May 19th, 2025- August 8th, 2025.Responsibilities:Engage with business users to prepare functional specs in Human Resources ApplicationsPerform feasibility analysis for analytical requestsBuild prototypes and wireframes of proposed analytical reporting/dashboard solutions using Power BICoordinate with data architecture, data engineering, and report development teams to develop analytical productsGuide business through user acceptance cyclesTo collaborate with cross functional teams to contribute to its objectivesResponsible to complete or participate in at least one strategic project (Capstone Project) during the internship and possibly give a short presentation to the executive team that showcases the projectParticipate in learning opportunities that may include tours of our warehouses and retail stores, a community service event (such as SpartanNash Expo, Helping Hands, or Special Olympics)Attend weekly professional development workshops for developing skills, team building, etc.QualificationsCurrently pursuing a bachelor's degree in a combined IT Field such as Computer Science or Management Information Systems AND Business or Human Resources (or related fields)Be an active student through the summerGraduate December 2025 or laterBe willing to attend mandatory, in-person events (2-3 events in Grand Rapids, Michigan including but not limited to orientation and/or intern gatherings)GPA of 3.0 or greater (Preferred)Relevant work experience such as a prior internship or campus experience (Preferred)Microsoft Office proficiency (Required)RDBMS (Relational Database) Knowledge (Required)Scripting Knowledge (Required)Functional knowledge of financial statements (Required)OLAP Knowledge (Preferred)Apache Tomcat or WebSphere Knowledge (Java, Groovy) (Preferred)Strong problem-solving and analytical capabilitiesEffective communication skillsThrives in ambiguous situationsResilient to overcome obstaclesDriven and demonstrates a bias for actionHighly collaborativeFlexible work program that supports work life balance, including a hybrid work model of 3 days in office, in Byron Center, Michigan.Housing assistance is available to candidates who meet eligibility requirements.Work within a fast paced and innovative company, meeting passionate colleagues and partners with diverse backgrounds and experiences! Apply Today!We are not able to sponsor work visas for this position.As part of our People First culture, SpartanNash is proud to offer a robust and competitive Total Rewards benefits package.SpartanNash is an Equal Opportunity Employer, including disability and veteran, that celebrates diversity and believes employing a diverse workforce is key to our success. We are committed to providing equal employment opportunities to all individuals.We are not able to sponsor work visas for this position.

Spartannash Interview Questions

Spartannash Interview Guides

Spartannash Interview Questions

Spartannash Salaries by Position

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