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

ivPotential Result Set Differences When Processing Null Data 31Chapter 4 4 Performance Considerations 35Increasing Throughput of the SAS Server 35Limiting Retrieval 35Repeatedly Accessing Data 37Sorting DBMS Data 37Temporary Table Support for SAS/ACCESS 38Chapter 5 4 Optimizing Your SQL Usage 41Overview of Optimizing Your SQL Usage 41Passing Functions to the DBMS Using PROC SQL 42Passing Joins to the DBMS 43Passing the DELETE Statement to Empty a Table 45When Passing Joins to the DBMS Will Fail 45Passing DISTINCT and UNION Processing to the DBMS 46Optimizing the Passing of WHERE Clauses to the DBMS 47Using the DBINDEX=, DBKEY=, and MULTI_DATASRC_OPT= Options 48Chapter 6 4 Threaded Reads 51Overview of Threaded Reads in SAS/ACCESS 51Underlying Technology of Threaded Reads 51SAS/ACCESS Interfaces and Threaded Reads 52Scope of Threaded Reads 52Options That Affect Threaded Reads 53Generating Trace Information for Threaded Reads 54Performance Impact of Threaded Reads 57Autopartitioning Techniques in SAS/ACCESS 57Data Ordering in SAS/ACCESS 58Two-Pass Processing for SAS Threaded Applications 58When Threaded Reads Do Not Occur 59Summary of Threaded Reads 59Chapter 7 4 How SAS/ACCESS Works 61Introduction to How SAS/ACCESS Works 61How the SAS/ACCESS LIBNAME Statement Works 62How the SQL Pass-Through Facility Works 63How the ACCESS Procedure Works 64How the DBLOAD Procedure Works 65Chapter 8 4 Overview of In-Database Procedures 67Introduction to In-Database Procedures 67Running In-Database Procedures 69In-Database Procedure Considerations and Limitations 70Using MSGLEVEL Option to Control Messaging 72PART2 General Reference 73