Update README.md

Added documentation for advanced conditions

Author: ratajs

README.md

@@ -137,9 +137,28 @@ Here is list of all SuperSQL flags:
   ], "number");
 
   //Use $ssql->deleteTable($table[, $flags]) to delete a table
-  $c->deleteTable("myTable");
+  $ssql->deleteTable("myTable");
 
   //To see a list of all tables in your database use $ssql->tableList([$flags])
-  print_r($c->tableList());
+  print_r($ssql->tableList());
+  
+  
+  //Advanced conditions
+  
+  
+  //You can use more advanced conditions with $ssql->cond(), this will select users that have the same username and nickname signed up in the last hour
+  $ssql->read("users", $ssql->cond()->eq("username", "nickname")->gte("sign_up_time", time() - 3600));
+  
+  //Use arrays to differentiate string values from column names and to specify more alternatives, the COND_OR flag is also supported
+  //This will select users that have username either "ratajs" or "admin" or that have username "RatajS"
+  $ssql->read("users", $ssql->cond()->eq("username", ["ratajs", "admin"])->eq("nickname", ["RatajS"], SQ::COND_OR));
+  
+  //->not negates the condition, this will select users with usernames other than admin
+  $ssql->read("users", $ssql->cond()->eq("username", ["admin"])->not());
+  
+  //It can also add another condition, this will select user that don’t have any nickname and with username other that "admin" or "root".
+  $ssql->read("users", $ssql->cond()->eq("nickname", [""])->not($ssql->cond()->eq("username", ["admin", "root"])));
+  
+  //Supported condition functions: ->eq(), ->lt(), ->gt(), ->lte(), ->gte(), ->like() and ->between()
 ?>
 ```