151 lines
2.3 KiB
SQL
151 lines
2.3 KiB
SQL
-- 1)
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SELECT
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emp_id,
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fname,
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lname
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FROM employee
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ORDER BY
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lname DESC,
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fname;
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-- 2)
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SELECT
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account_id,
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cust_id,
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avail_balance
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FROM account
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WHERE
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status = 'ACTIVE'
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AND
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avail_balance > 2500;
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-- 3)
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SELECT DISTINCT(open_emp_id)
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FROM account;
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-- 4)
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SELECT COUNT(account_id)
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FROM account;
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-- 5)
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SELECT
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individual.fname,
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individual.lname,
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COUNT(*)
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FROM individual
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JOIN account
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ON individual.cust_id = account.cust_id
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GROUP BY
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individual.fname,
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individual.lname;
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-- 6)
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SELECT
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individual.fname,
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individual.lname,
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COUNT(*)
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FROM account
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JOIN individual
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ON account.cust_id = individual.cust_id
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GROUP BY
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individual.fname,
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individual.lname
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HAVING
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COUNT(*) >= 2;
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-- 7)
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SELECT *
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FROM account
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WHERE EXTRACT(YEAR FROM open_date) = 2002;
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-- 8)
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SELECT *
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FROM individual
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WHERE lname LIKE '_a%e%';
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-- 9)
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SELECT
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account.account_id,
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customer.fed_id,
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product.name
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FROM account
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JOIN individual
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ON account.account_id = individual.cust_id
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JOIN customer
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ON account.account_id = customer.cust_id
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JOIN product
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ON account.product_cd = product.product_cd;
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-- 10)
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SELECT
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e.emp_id,
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e.fname,
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e.lname
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FROM employee e
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JOIN employee s
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ON e.superior_emp_id = s.superior_emp_id
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JOIN department d1
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ON e.dept_id = d1.dept_id
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JOIN department d2
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ON s.superior_emp_id = d2.dept_id
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WHERE d1.dept_id <> d2.dept_id;
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-- 11)
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SELECT
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i.fname,
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i.lname
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FROM individual i
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UNION
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SELECT
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e.fname,
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e.lname
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FROM employee e;
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-- 12)
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SELECT
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s.fname || ' ' || s.lname AS superior,
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STRING_AGG(e.fname || ' ' || e.lname, ', ') AS employees
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FROM employee s
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JOIN employee e
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ON e.superior_emp_id = s.emp_id
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GROUP BY s.fname, s.lname;
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-- 13)
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SELECT
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a.account_id,
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a.cust_id,
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COALESCE(b.name, i.fname || ' ' || i.lname)
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FROM account a
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JOIN customer c
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ON a.cust_id = c.cust_id
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LEFT JOIN business b
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ON c.cust_id = b.cust_id
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LEFT JOIN individual i
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ON c.cust_id = i.cust_id;
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-- 14)
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SELECT
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COALESCE(b.name, i.fname || ' ' || i.lname) customer_name
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FROM (
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SELECT
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cust_id,
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SUM(avail_balance) AS balance
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FROM account
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GROUP BY cust_id
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ORDER BY balance DESC
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LIMIT 1
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) top_customer
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JOIN customer c
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ON top_customer.cust_id = c.cust_id
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LEFT JOIN business b
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ON c.cust_id = b.cust_id
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LEFT JOIN individual i
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ON c.cust_id = i.cust_id;
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-- 15)
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SELECT
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a.account_id,
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p.name
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FROM account a
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FULL JOIN product p
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ON a.product_cd = p.product_cd |