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Certificate · AL
CDE – Certified Entry-Level Database Specialist
OpenEDG
Median earnings
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Cost
$69
Duration
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Completion
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CDE validates foundational database knowledge and practical SQL skills. This entry-level OpenEDG credential confirms the ability to build, query, modify, organize, and troubleshoot relational databases. There are no formal prerequisites. The English-language exam has 40 items, runs 60 minutes plus a short tutorial, and requires a 75% overall score to pass. Exam CDE-500-0x.
Distinguish structured from unstructured data and compare relational and NoSQL database modelsIdentify common relational database engines and explain SQL’s declarative approachCreate databases and tables and modify table schemas using DDL statementsSelect and apply appropriate SQL data types for table columnsQuery, insert, update, and delete records with core DML statements with filtering conditionsLimit returned rows and apply LIKE pattern matching in queriesTurn data into summaries with aggregate functions and GROUP BY clausesSort query results with ORDER BY, including in grouped queriesCombine tables using inner, left, right, full outer, cross, and self joinsBuild layered queries using subqueries and common table expressionsExplain the purpose of normalization in relational database designManage transactions and explain the ACID propertiesUse indexes to improve query performanceTroubleshoot queries by interpreting common SQL error messagesApply basic database security, backup, and teamwork practices