https://communities.sas.com/t5/SAS-Programming/Performance-Issue-Proc-SQL/m-p/10390#M777 You have probably run out of memory (or run up against the OS limit) and it is swapping to disk; SQL has to hold all of the results in memory. Better to break the query into pieces or use PROC FREQ (though you still may run out of memory) as described to you last month<BR /> <A href="http://support.sas.com/forums/message.jspa?messageID=17830#17830" target="_blank">http://support.sas.com/forums/message.jspa?messageID=17830#17830</A> Wed, 25 Mar 2009 15:55:05 GMT Doc_Duke 2009-03-25T15:55:05Z https://communities.sas.com/t5/SAS-Programming/Performance-Issue-Proc-SQL/m-p/10389#M776 I have a dataset with arround 400 variables and it has 3 lakh records<BR /> i want to calculate all variables unique count,<BR /> <BR /> i have used<BR /> proc sql; distinct count <BR /> <BR /> but it is taking too much time that is around 1hr 20min<BR /> <BR /> can anybody help me in this? Wed, 25 Mar 2009 08:51:00 GMT https://communities.sas.com/t5/SAS-Programming/Performance-Issue-Proc-SQL/m-p/10389#M776 deleted_user 2009-03-25T08:51:00Z https://communities.sas.com/t5/SAS-Programming/Performance-Issue-Proc-SQL/m-p/10390#M777 You have probably run out of memory (or run up against the OS limit) and it is swapping to disk; SQL has to hold all of the results in memory. Better to break the query into pieces or use PROC FREQ (though you still may run out of memory) as described to you last month<BR /> <A href="http://support.sas.com/forums/message.jspa?messageID=17830#17830" target="_blank">http://support.sas.com/forums/message.jspa?messageID=17830#17830</A> Wed, 25 Mar 2009 15:55:05 GMT https://communities.sas.com/t5/SAS-Programming/Performance-Issue-Proc-SQL/m-p/10390#M777 Doc_Duke 2009-03-25T15:55:05Z