1. Xin 2010-11-01

2.  Syntax ◦ SELECT field1 AS title1, field2 AS title2,... ◦ FROM table1, table2 ◦ WHERE conditions  Make a query that returns all records from a table  Create a query that shows (1) title name and (2) type from bktblTitles  Create a query that displays (1) title name along with (2) book’s publisher and (3) its author’s last name.

3.  Functions ◦ Set conditions for retrieved records  Similar to criteria in Design View ◦ Build relationships between tables  Practice ◦ Create a query that returns the titles of “biography” books ◦ Create a query that displays (1) title name along with (2) book’s publisher and (3) its author’s last name. Ensure that each record is correct. ◦ Create a query that displays (1) book title ID, (2) book title name, (3) publisher’s name, and (4) author’s last name. Only show California published entries.

4.  Aggregate functions ◦ Avg, count, min, max,...  Practices ◦ Create a query to compute the total and average sales  GROUP BY clause  Practices ◦ Modify the just created query, so that it shows the total and average sales of books of each type  HAVING clause ◦ Set conditions to results of aggregate functions  In comparison, WHERE  individual records ◦ Must work with GROUP BY ◦ Example  SELECT type, AVG(sales) AS AvgOfsales  FROM bktblTitles  WHERE pages>100  GROUP BY bktblTitles.type  HAVING SUM(sales)>100000;

5.  Practices ◦ Create a query that displays the # of books each publisher has published. ◦ Modify the query, so that it includes records of books with authors living in “NY”. Only groups of records with page numbers of titles greater than 100.