SAS/ACCESS 9.2 for Relational Databases: Reference, Fourth Edition

854 Querying Multiple DBMS Tables 4 Chapter 29Querying Multiple DBMS TablesYou can also retrieve data from multiple DBMS tables in a single query by using theSQL procedure. This example joins the Oracle tables Staff and Payroll to query salaryinformation for employees who earn more than $40,000.libname mydblib oracle user=testuser password=testpass;title ’Employees with salary greater than $40,000’;options obs=20;proc sql;select a.lname, a.fname, b.salaryformat=dollar10.2from mydblib.staff a, mydblib.payroll bwhere (a.idnum eq b.idnum) and(b.salary gt 40000);quit;Note: By default, SAS/ACCESS passes the entire join to the DBMS for processing inorder to optimize performance. See “Passing Joins to the DBMS” on page 43 for moreinformation. 4Output 29.8Querying Multiple Oracle TablesEmployees with salary greater than $40,000LNAME FNAME SALARY--------------------------------------------WELCH DARIUS $40,858.00VENTER RANDALL $66,558.00THOMPSON WAYNE $89,977.00RHODES JEREMY $40,586.00DENNIS ROGER $111379.00KIMANI ANNE $40,899.00O’NEAL BRYAN $40,079.00RIVERS SIMON $53,798.00COHEN LEE $91,376.00GREGORSKI DANIEL $68,096.00NEWKIRK WILLIAM $52,279.00ROUSE JEREMY $43,071.00The next example uses the SQL procedure to join and query the DB2 tables March,Delay, and Flight. The query retrieves information about delayed international flightsduring the month of March.libname mydblib db2 ssid=db2;title "Delayed International Flights in March";proc sql;select distinct march.flight, march.dates format datetime9.,delay format=2.0from mydblib.march, mydblib.delay,mydblib.internat