Hi,

Basically. I had an SQL comand that made logical sense but ran very slowly on MySQL. So I converted it to 4 SQL statements instead, however extremely messy running those seperately in Perl 

      my $sql_count_A_Ref_inters_Comp = "      
    

DROP TABLE IF EXISTS e_annotation_090812.TEMP_reference_table;

CREATE TABLE e_annotation_090812.TEMP_reference_table (
    Key_m INT NOT NULL AUTO_INCREMENT,
    Entity_name_copy varchar(254) NOT NULL,
    PRIMARY KEY (Key_m)
);

INSERT INTO e_annotation_090812.TEMP_reference_table (Entity_name_copy
+) 
SELECT A.entity_name 
FROM    e_annotation_090812.annotation A 
join    e_annotation_090812.Temp_table T on T.Line=A.user
where 
A.centre like '".$Reference."'
and A.entity_name like '_%'
and A.evidence_code not like '%_________8__';


SELECT '".$Reference."', '".$Comparitor."', A.entity_name, A.* 
FROM    e_annotation_090812.annotation A 
join    e_annotation_090812.Temp_table T on T.Line=A.user
where A.entity_name like '_%'
  and A.evidence_code not like '%_________8__'
  and A.centre like '".$Comparitor."'
  and A.entity_name IN (                      
            SELECT E.Entity_name_copy 
            FROM   e_annotation_090812.TEMP_reference_table E
            );

";

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Can I not just prepare, execute and return the products of the select statement in one go using Perl DBI? Maybe a different SQL query could do the trick.

In reply to prepare, execute and return the product - Perl DBI by Freezer

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