Notes
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SELECT*FROM tab;
SELECT constraint_name FROM user_constraints;
SELECT sequence_name FROM user_sequences;
SELECT*FROM students;
SELECT student_firstname, tel_no
FROM students;
SELECT student_firstname, student_surname, tel_no
FROM students
WHERE country = 'UK';
SELECT company_id, company_name, city, training_budget
FROM companies
WHERE company_id = 40;
SELECT company_id, company_name, city, training_budget
FROM companies
WHERE company_id<40;
SELECT company_id, company_name, city, training_budget
FROM companies
WHERE company_id>40;
SELECT company_id, company_name, city, training_budget
FROM companies
WHERE company_id IN(40,50,60);
SELECT company_id, company_name, city, training_budget
FROM companies
WHERE company_id
BETWEEN 10 AND 30;
SELECT company_id, company_name, city, training_budget
FROM companies
WHERE company_id
NOT BETWEEN 10 AND 30;
SELECT student_firstname, student_surname, city, country
FROM students
WHERE student_surname BETWEEN 'E%' AND'T%';
SELECT student_firstname, student_surname, city, country
FROM students
WHERE student_surname <'F%';
SELECT student_firstname, student_surname, city, country
FROM students
WHERE student_surname LIKE '%k%';
SELECT student_firstname, student_surname, city, country
FROM students
WHERE student_surname LIKE '_OS%';
e, to_char(DOB, 'DAY') birthday
FROM students;SELECT student_firstname, student_surname, city, country
FROM students
WHERE student_surname LIKE '_O%E%';
SELECT student_firstname, student_surname, city, country
FROM students
WHERE student_surname NOT LIKE '_O%';
SELECT student_firstname, student_surname
FROM students
WHERE GENDER = 'F'
AND country = 'UK';
SELECT student_firstname, student_surname
FROM students
WHERE GENDER = 'M'
AND DOB < '1-jan-1981';
SELECT student_firstname, student_surname
FROM students
WHERE country = 'UK'
AND GENDER = 'F';
SELECT student_firstname, GENDER
FROM students
WHERE GENDER='&SEX';
SELECT student_id, student_firstname, student_surname, GENDER, tel_no
FROM students
WHERE student_surname LIKE '&FIRSTLETTER%';
SELECT student_firstname, student_surname, to_char(DOB, 'DAY') birthday
FROM students;
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