Hybrid Queries (from Fraktal SAS Programming)

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What is this?

The qualifying term "hybrid" denotes to the fact that a single piece of SQL code is processed by a number of systems that are integrated by appropriate middleware in a way that system borders are not visible when looking at the code.

We will use a maximum simplified task to be coded in SQL:

  • A SAS dataset shall be created
  • Data for which are kept in a DBMS table
  • The DBMS talks ANSI SQL
  • SAS can connect to the DBMS using SAS/Connect software
  • The solution uses Proc SQL from Base SAS software


Documented Code Example

Code executed Function performed
proc sql;
Start the SQL interpreter inside SAS
connect to oracle 
(user="&DB_USR." 
 password="&DB_PWD." 
 path="&DB_PTH."
);
Open connection to the DBMS using your credentials stored in Macro Variables
create table my_sas_tab as 
Initiate creating your SAS table using ANSI SQL code
select * 
  from connection to oracle
Start your query from inside SAS with a special from clause
(
select * 
  from ops$&DB_USR..&MYTABLE.
)
Inside brackets use DBMS specific SQL; Macro Variables are resolved before code is passed to any processing system
;
Execute the query by issuing the SAS statement terminator ';'
disconnect from oracle;
Close connection to DBMS
quit;
Terminate SAS SQL interpreter status

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