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CrowdDB: Answering Queries with Crowdsourcing

Summary: CrowdDB extends SQL-based query processing by outsourcing missing or fuzzy results to crowdsourcing. It treats crowd input as a first-class data source under a non-closed-world model and introduces crowd-aware operators, with early MTurk experiments. (summarized by gpt-5-nano on Feb 09 2026)

Paper ID
4372
Venue
SIGMOD
Year
2011
Pagerank
0.00035112703
Overall Rank
92 | 99.37%
DOI
-

Incoming Non-self Citations Over Time

Authors

Incoming Citations (Sorted by Pagerank)

Showing 50 of 75 citing papers.

Rank Citing Paper Year Venue Pagerank
195 CrowdER: Crowdsourcing Entity Resolution 2012 VLDB 0.00025937231
261 Human-powered Sorts and Joins 2012 VLDB 0.00023143782
451 Corleone: Hands-Off Crowdsourcing for Entity Matching 2014 SIGMOD 0.00018316217
549 Magellan: Toward Building Entity Matching Management Systems 2016 VLDB 0.00016760472
730 So Who Won? Dynamic Max Discovery with the Crowd 2012 SIGMOD 0.00014688151
835 Leveraging Transitive Relations for Crowdsourced Joins 2013 SIGMOD 0.00013767635
922 Question Selection for Crowd Entity Resolution 2013 VLDB 0.00013260695
980 CrowdScreen: Algorithms for Filtering Data with Humans 2012 SIGMOD 0.00012919669
1,262 CDAS: A Crowdsourcing Data Analytics System 2012 VLDB 0.00011519271
1,541 DocETL: Agentic Query Rewriting and Evaluation for Complex Document Processing 2025 VLDB 0.00010488053
1,631 Falcon: Scaling Up Hands-Off Crowdsourced Entity Matching to Build Cloud Services 2017 SIGMOD 0.0001023042
1,783 CrowdDB: Query Processing with the VLDB Crowd 2011 VLDB 9.8490419e-05
1,923 Counting with the Crowd 2013 VLDB 9.5654034e-05
2,010 Data Market Platforms: Trading Data Assets to Solve Data Problems 2020 VLDB 9.3907822e-05
2,132 Demonstration of Qurk: A Query Processor for Human Operators 2011 SIGMOD 9.18209e-05
2,396 Deco: A System for Declarative Crowdsourcing 2012 VLDB 8.7176245e-05
2,520 dbTouch: Analytics at your Fingertips 2013 CIDR 8.5425551e-05
2,537 Query-Oriented Data Cleaning with Oracles 2015 SIGMOD 8.5145166e-05
2,593 Scaling Up Crowd-Sourcing to Very Large Datasets: A Case for Active Learning 2015 VLDB 8.4369399e-05
2,598 CrowdFill: Collecting Structured Data from the Crowd 2014 SIGMOD 8.4313217e-05
2,752 Crowd Mining 2013 SIGMOD 8.230371e-05
3,215 iCrowd: An Adaptive Crowdsourcing Framework 2015 SIGMOD 7.7024968e-05
3,273 Finish Them!: Pricing Algorithms for Human Computation 2014 VLDB 7.636934e-05
3,360 Truth Inference in Crowdsourcing: Is the Problem Solved? 2017 VLDB 7.5480966e-05
3,852 Optimal Crowd-Powered Rating and Filtering Algorithms 2014 VLDB 7.1244434e-05
3,914 Exploiting Correlations for Expensive Predicate Evaluation 2015 SIGMOD 7.0851333e-05
3,935 CLAMShell: Speeding up Crowds for Low-latency Data Labeling 2016 VLDB 7.0742432e-05
3,951 Crowd-Based Deduplication: An Adaptive Approach 2015 SIGMOD 7.0687525e-05
4,008 Magellan: Toward Building Entity Matching Management Systems over Data Science Stacks 2016 VLDB 7.0316405e-05
4,098 Whom to Ask? Jury Selection for Decision Making Tasks on Micro-blog Services 2012 VLDB 6.9666053e-05
4,116 QASCA: A Quality-Aware Task Assignment System for Crowdsourcing Applications 2015 SIGMOD 6.9545589e-05
4,207 Revisiting Prompt Engineering via Declarative Crowdsourcing 2024 CIDR 6.8969086e-05
4,365 Arnold: Declarative Crowd-Machine Data Integration 2013 CIDR 6.8094389e-05
4,495 Reducing Uncertainty of Schema Matching via Crowdsourcing 2013 VLDB 6.7265248e-05
4,835 Cost-Effective Crowdsourced Entity Resolution: A Partial-Order Approach 2016 SIGMOD 6.55369e-05
4,906 Hybrid Querying Over Relational Databases and Large Language Models 2025 CIDR 6.5147664e-05
5,085 An Online Cost Sensitive Decision-Making Method in Crowdsourcing Systems 2013 SIGMOD 6.4366515e-05
5,113 Logical and Physical Optimizations for SQL Query Execution over Large Language Models 2025 SIGMOD 6.4232517e-05
5,126 Argonaut: Macrotask Crowdsourcing for Complex Data Processing 2015 VLDB 6.4180375e-05
5,185 CDB: A Crowd-Powered Database System 2018 VLDB 6.394399e-05
5,275 Crowdsourcing Applications and Platforms: A Data Management Perspective 2011 VLDB 6.3601514e-05
5,398 CrowdQ: Crowdsourced Query Understanding 2013 CIDR 6.301505e-05
6,115 GenEdit: Compounding Operators and Continuous Improvement to Tackle Text-to-SQL in the Enterprise 2025 CIDR 6.0346122e-05
6,488 Query Optimization over Crowdsourced Data 2013 VLDB 5.9222389e-05
6,721 Estimating the Impact of Unknown Unknowns on Aggregate Query Results 2016 SIGMOD 5.8489574e-05
6,797 Cost-Effective Data Annotation using Game-Based Crowdsourcing 2019 VLDB 5.8305073e-05
6,897 Answering Planning Queries with the Crowd 2013 VLDB 5.8136058e-05
7,195 Interactive Graph Search 2019 SIGMOD 5.7333061e-05
7,240 Crowdsourced Data Management: Overview and Challenges 2017 SIGMOD 5.7186285e-05
7,360 Human-in-the-loop Data Integration 2017 VLDB 5.6924971e-05
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Outgoing Citations (Sorted by Pagerank)

Showing 8 of 8 cited papers.

Citations counted here include only citations to other VLDB/SIGMOD/CIDR/PODS papers in this database.

Rank Cited Paper Year Venue Pagerank
168 Optimizing Queries across Diverse Data Sources 1997 VLDB 0.00027754227
249 Answering Queries using Humans, Algorithms and Databases 2011 CIDR 0.00023532482
250 Crowdsourced Databases: Query Processing with People 2011 CIDR 0.00023506282
373 On Saying "Enough Already!" in SQL 1997 SIGMOD 0.00019857305
750 Human-Assisted Graph Search: It’s Okay to Ask Questions 2011 VLDB 0.00014388892
786 Query Execution Techniques for Caching Expensive Methods 1996 SIGMOD 0.0001408317
5,665 PIQL: A Performance Insightful Query Language 2010 SIGMOD 6.1962536e-05
6,011 Crowds, Clouds, and Algorithms: Exploring the Human Side of "Big Data" Applications 2010 SIGMOD 6.070398e-05
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Semantically Similar Papers

Overall Rank Paper Year Venue Pagerank
980 CrowdScreen: Algorithms for Filtering Data with Humans 2012 SIGMOD 0.00012919669
2,132 Demonstration of Qurk: A Query Processor for Human Operators 2011 SIGMOD 9.18209e-05
5,275 Crowdsourcing Applications and Platforms: A Data Management Perspective 2011 VLDB 6.3601514e-05
261 Human-powered Sorts and Joins 2012 VLDB 0.00023143782
7,501 Pushing the Boundaries of Crowd-enabled Databases with Query-driven Schema Expansion 2012 VLDB 5.6643187e-05
11,796 CDB: Optimizing Queries with Crowd-Based Selections and Joins 2017 SIGMOD 5.1725247e-05
5,185 CDB: A Crowd-Powered Database System 2018 VLDB 6.394399e-05
250 Crowdsourced Databases: Query Processing with People 2011 CIDR 0.00023506282
5,398 CrowdQ: Crowdsourced Query Understanding 2013 CIDR 6.301505e-05
1,783 CrowdDB: Query Processing with the VLDB Crowd 2011 VLDB 9.8490419e-05