Hybrid Queries (from Fraktal SAS Programming): Unterschied zwischen den Versionen

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|übersicht=DBMS Interaction (from Fraktal SAS Programming)
 
|übersicht=DBMS Interaction (from Fraktal SAS Programming)
 
}}
 
}}
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== What is this? ==
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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.
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We will use a maximum simplified task to be coded in SQL:
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* A '''SAS dataset''' shall be created
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* Data for which are kept in a '''DBMS table'''
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* The DBMS talks '''ANSI SQL'''
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* SAS can connect to the DBMS using '''SAS/Connect software'''
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* The solution uses '''Proc SQL''' from Base SAS software
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== Documented Code Example ==
  
 
{| class="wikitable"
 
{| class="wikitable"
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|-
 
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|
 
|
−
  connect to oracle (user="&DB_USR." password="&DB_PWD." path="&DB_PTH.");
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  connect to oracle  
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| '''Open connection to the DBMS using your credentials stored in [[Macro Variables]]'''
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(user="&DB_USR."  
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  password="&DB_PWD."  
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  path="&DB_PTH."
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);
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| '''Open connection to the DBMS using your credentials stored in [[Symbol_Tables_(from_Fraktal_SAS_Programming)|Macro Variables]]'''
 
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|-
 
|   
 
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   from ops$&DB_USR..&MYTABLE.
 
   from ops$&DB_USR..&MYTABLE.
 
  )
 
  )
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| '''Inside brackets use DBMS specific SQL'''
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| '''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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Vorwärts

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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