Brand new to forum....

I had the same problem...
during the install on my localhost at the point where the demo data is being loaded I got this DB error
================
         Name    Info
        10000::database error
        SQL Error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use
            near 'AND  st.status = 1 AND se.`group` NOT IN (SELECT `key` FROM extensions)' at line 4
        Error No: 1064
        SQL: SELECT se.`key`, se.`value`, st.store_id FROM settings se RIGHT JOIN stores st ON se.store_id = st.store_id
                    WHERE se.store_id = AND st.status = 1
         AND se.`group` NOT IN (SELECT `key` FROM extensions); in C:\www\public_html\store\core\database\amysqli.php on line 106
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The SQL issue is in the part of the query
                   **** WHERE se.store_id = AND st.status = 1 ****
there is no value after se.store_id

I debugged the code and not sure where store ID should be properly set but this is where I found / fixed a bug and the install worked for me
===============
/core/lib/config.php around line 230 in method _load_settings()

org code  ( line 230 is last line below and is what I changed)
===========
      if (IS_ADMIN) {
         //Check if admin has specific store in session or selected
         $session = $this->registry->get('session');
         $store_id = $this->registry->get('request')->get['store_id'];
         if (has_value($store_id)) {
             $this->cnfg['current_store_id'] = (int)$store_id;
         } else if(has_value($session->data['current_store_id'])) {
             $this->cnfg['current_store_id'] = $session->data['current_store_id'];   
         } else {
            //nothing to do
             $this->cnfg['current_store_id'] = $session->data['config_store_id'];            


new code
==============
      if (IS_ADMIN) {
         //Check if admin has specific store in session or selected
         $session = $this->registry->get('session');
         $store_id = $this->registry->get('request')->get['store_id'];
         if (has_value($store_id)) {
             $this->cnfg['current_store_id'] = (int)$store_id;
         } else if(has_value($session->data['current_store_id'])) {
             $this->cnfg['current_store_id'] = $session->data['current_store_id'];   
         } else {
            //nothing to do
            // but above test shows this has no value...so assign default of 0
            // install fails
            // CLT 7/27/16
             $this->cnfg['current_store_id'] = 0; // $session->data['config_store_id'];   

=====================
NOTE:  I had to start my install fresh
    delete my DB
    unpack the source again
     make the above code change
before I re-ran the install so the whole install would start over.....but the above change worked for me