mysql - SQL query using MAX and SUBSTRING_INDEX in php -


how execute complex query in drupal

i tried :

 $sql = "select  max(substring_index(`table_field1`, '/', -1)) mm `tableitems` table_field2=' " .$selvalue."'";  $query = db_query($sql);  echo $query;

it returns array echo output.

can please guide me through this. wanted maximum value column in database. , iam getting correct value when tried in mysql directly.

also tried:

 $sql = "select  max(substring_index(`table_field1`, '/', -1)) mm `tableitems` fieldprefix=' " .$selvalue."'";  $query = db_query($sql);  foreach($query $r)   echo $r->mm;

but still gives incorrect

you have use below fetch field value in drupal

$sql = "select  max(substring_index(`table_field1`, '/', -1)) mm `tableitems` table_field2=' " .$selvalue."'"; $query = db_query($sql)->fetchfield(); print_r($query);

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