Learn how to master the SELECT statement ... column name as its parameter, and it will return “0” if it’s used on a non-numeric column. SELECT AVG(net_amount) FROM Sales; You can limit ...

Read this SQL tutorial ... a simple SELECT statement will meet your needs. JOIN works in the same way as the SELECT statement above: It returns a result set with columns from different tables.

First, you specify a PROC SQL CONNECT statement to connect to a particular ORACLE database that resides on a remote server. You refer to the database with the alias MYDB. Then you list the columns ...

As one composes SQL Select statements, the author may use another query in place of any table or view. Even individual columns may be replaced with ... Of course, many databases do have a limit on the ...

For comparison, the equivalent SQL query to return all of the students in CS 101 would be something like SELECT student.name FROM courses, enrollees, students WHERE course.name ="CS 101" That ...