SQL200.2 Module 2
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This document summarizes an SQL programming workshop covering topics like joins, subqueries, unions, calculations, and grouping. The workshop covers inner, outer, left, and right joins. It also discusses correlated and uncorrelated subqueries, unions, calculated fields, string manipulation, date functions, and aggregate functions. Examples are provided for many of these SQL concepts.
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- 1. SQL200 SQL Programming Workshop 2 – Joins, Subqueries, Unions, Calculations and Grouping
- 2. SQL200 Contact Information P.O. Box 6142 Laguna Niguel, CA 92607 949-489-1472 http://www.d2associates.com [email_address] Copyright 2001-2009. All rights reserved.
- 3. SQL200 SQL Programming Part 1 – Joins, Subqueries
- 4. Relational Database with constraints (from text)
- 9. Inner Join Older Syntax: Select <column-list> From <tablelist> Where <predicate> Still very commonly used
- 10. Inner Join Example using older syntax: SELECT customer_first_name, customer_street, order_numb, order_date from customers, orders Where customers.customer_numb = orders.customer_numb
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- 12. Inner Join (New Syntax) Basic SQL 92 Syntax: Select <column-list> From <table1> Inner join <table2> On <join condition>
- 13. Inner Join Basic Example: SELECT customer_first_name, customer_street, order_numb, order_date from customers inner join orders on customers.customer_numb = orders.customer_numb
- 14. Inner Join with Result
- 16. Inner Join Result in MS Access
- 19. Cross Join Result Set in MS Access
- 23. Multi-table Join with Results
- 24. MS Access Multi-table Join Result Set
- 28. Self Joins SELECT e.*, m.name FROM employees AS e, employees AS m WHERE e.managerid = m.employeeid;
- 31. Left Outer Join Basic SQL 92 Syntax: Select <column-list> From <table1> Left join <table2> On <join condition>
- 32. Left-Join Basic Example: SELECT customer_first_name, customer_street, order_numb, order_date from customers as c left join orders as o on c.customer_numb = o.customer_numb
- 34. Left Join with Results
- 35. SQL200 SQL Programming Part 2– Subqueries, Unions
- 37. Uncorrelated Subquery select isbn, quantity from orderlines ol where ol.order_numb in (select o.order_numb from orders o where order_date between #1/1/99# and #12/31/99#)
- 38. Uncorrelated Subquery with Results
- 40. Negative Subquery select isbn, quantity from orderlines ol where ol.order_numb not in (select o.order_numb from orders o where order_date between #1/1/99# and #12/31/99#)
- 41. Negative Subquery with Results
- 43. Correlated subquery with Exists SELECT isbn, quantity FROM orderlines AS ol WHERE exists (select * from orders o where ol.order_numb = o.order_numb and o.order_date between #1/1/99# and #12/31/99#); This type of query covered in intermediate SQL class
- 45. Unions Select <column-list> from <table1> Union [ALL] Select <same-columns> from <table2>
- 46. Unions select * from employees union all select * from employees_copy
- 47. Results of Union query
- 48. SQL200 SQL Programming Part 3 – Calculations, Aggregates
- 50. Calculated field in the Result
- 54. Concatenation select customer_first_name & " " & trim(customer_last_name) as Name from customers
- 58. Aggregate Functions Basic syntax: Select <function>(<column>) From <table> Group by <column-list> Having <predicate> Group by all columns to left of one(s) you want to aggregate
- 59. Aggregate Functions SELECT orderlines.order_numb, Count(*) AS "Number of Order Lines ", Sum(orderlines.quantity) AS SumOfquantity, Sum([quantity]*[cost_each]) AS extension FROM orderlines GROUP BY orderlines.order_numb having count(*) > 1
- 63. Exercise Result [end module]