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Consider a database schema consisting of two tables, Employee(ID, Name, Address, Position) and a table that stores employee certifications, Certificates(EID, CertName, Date). (ID) and (EID,
Consider a database schema consisting of two tables, Employee(ID, Name, Address, Position) and a table that stores employee certifications, Certificates(EID, CertName, Date). (ID) and (EID, CertName) are the primary keys for each respective table. EID is the foreign key referencing Employee(ID). Write SQL queries
Find all employees that have fewer than 3 certifications (note that this should include 0 or the query is wrong)
(a) Implement this query using a join
(b) Implement the same query using a subquery
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