Hybrid Queries (from Fraktal SAS Programming): Unterschied zwischen den Versionen
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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. | 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 SQL: | + | We will use a maximum simplified task to be coded in SQL: |
* A '''SAS dataset''' shall be created | * A '''SAS dataset''' shall be created | ||
* Data for which are kept in a '''DBMS table''' | * Data for which are kept in a '''DBMS table''' | ||
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from ops$&DB_USR..&MYTABLE. | from ops$&DB_USR..&MYTABLE. | ||
) | ) | ||
| − | | '''Inside brackets use DBMS specific SQL''' | + | | '''Inside brackets use DBMS specific SQL; [[Symbol_Tables_(from_Fraktal_SAS_Programming)|Macro Variables]] are resolved before code is passed to any processing system''' |
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Aktuelle Version vom 2. Juli 2014, 14:32 Uhr
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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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