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CREATE TABLE myStudents( id INT, name VARCHAR(100), age INT CHECK(age>0) ); CREATE TABLE myCourses( id INT PRIMARY KEY, name VARCHAR(100), category VARCHAR(100), number_of_students INT CHECK(number_of_students >=0) ); INSERT INTO myStudents VALUES (1, 'Peter', 20), (2, 'Ava', 23); select * from myStudents
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