Distinct

sqlquerybuilder/__init__.py

@@ -241,6 +241,7 @@ class SQLQuery(object):
         self._limits = None
         self._sql = sql
         self._nolock = False
+        self._distinct = False
 
     def has_filters(self,):
         return self._order_by or self._group_by or self._joins\
@@ -272,6 +273,11 @@ class SQLQuery(object):
         clone._nolock = enabled
         return clone
 
+    def distinct(self, enabled=True):
+        clone = self._clone()
+        clone._distinct = enabled
+        return clone
+
     def filter(self, *args, **kwargs):
         clone = self._clone()
         clone._filters &= self._q(*args, **kwargs)
@@ -374,6 +380,11 @@ class SQLCompiler(object):
             return " WITH (NOLOCK)"
         return ""
 
+    def get_distinct(self,):
+        if self._distinct:
+            return " DISTINCT "
+        return ""
+
     def get_limits(self,):
         if self._limits and self.sql_mode != "SQL_SERVER":
             offset = self._limits.start
@@ -397,7 +408,10 @@ class SQLCompiler(object):
         else:
             table = self.get_table()
 
-        sql = ["SELECT", self.get_top(), self.get_columns(),
+        sql = ["SELECT",
+               self.get_distinct(),
+               self.get_top(),
+               self.get_columns(),
                "FROM", table,
                self.get_nolock(),
                self.get_joins(), self.get_where(),