topic Creating complex indexes in datasets in SAS Programming

Creating complex indexes in datasets

V_Andy — Mon, 14 Nov 2011 09:29:10 GMT

Hello, everybody!

We can create simple indexes using the following statement.

Proc SQL;

Create Index {Index_name} On {Table_name} (Table_variable)

;

Quit;

Sometimes we have more than one variable to match data in datasets.

....

Where

A.Field1 = B.Field1 And

A.Field2 = B.Field2

....

To decrease work time it is necessary to create indexes. But in this situation it is not so efficient to create two simple indexes on Field1 and Field2, especially if data in Field1 or Field2 have only two or three variants (1, 2 and 3 for example).

In Oracle we can create complex indexes on two or more fields.

How can I create complex index in SAS Dataset?

Creating complex indexes in datasets

LinusH — Mon, 14 Nov 2011 09:41:19 GMT

The term you should search for in the SAS on-line doc is "composite index".

/Linus

Creating complex indexes in datasets

Ksharp — Tue, 15 Nov 2011 02:10:08 GMT

Proc SQL;

Create Index Index_name On Table_name (Field1,Field2)

;

Quit;

proc datasets library=work nolist;

modify table_name;

index create index_name=(field1 field2 );

quit;

Ksharp