diff --git a/client/ledis-py/ledis/client.py b/client/ledis-py/ledis/client.py
index 17cc1c4..2504e5d 100644
--- a/client/ledis-py/ledis/client.py
+++ b/client/ledis-py/ledis/client.py
@@ -733,6 +733,70 @@ class Ledis(object):
         "Return the score of element ``value`` in sorted set ``name``"
         return self.execute_command('ZSCORE', name, value)
 
+    def zinterstore(self, dest, keys, aggregate=None):
+        """
+        Intersect multiple sorted sets specified by ``keys`` into
+        a new sorted set, ``dest``. Scores in the destination will be
+        aggregated based on the ``aggregate``, or SUM if none is provided.
+        """
+        return self._zaggregate('ZINTERSTORE', dest, keys, aggregate)
+
+    def zunionstore(self, dest, keys, aggregate=None):
+        """
+        Union multiple sorted sets specified by ``keys`` into
+        a new sorted set, ``dest``. Scores in the destination will be
+        aggregated based on the ``aggregate``, or SUM if none is provided.
+        """
+        return self._zaggregate('ZUNIONSTORE', dest, keys, aggregate)
+
+    def _zaggregate(self, command, dest, keys, aggregate=None):
+        pieces = [command, dest, len(keys)]
+        if isinstance(keys, dict):
+            keys, weights = iterkeys(keys), itervalues(keys)
+        else:
+            weights = None
+        pieces.extend(keys)
+        if weights:
+            pieces.append(Token('WEIGHTS'))
+            pieces.extend(weights)
+        if aggregate:
+            pieces.append(Token('AGGREGATE'))
+            pieces.append(aggregate)
+        return self.execute_command(*pieces)
+
+    def zrangebylex(self, name, min, max, start=None, num=None):
+        """
+        Return the lexicographical range of values from sorted set ``name``
+        between ``min`` and ``max``.
+
+        If ``start`` and ``num`` are specified, then return a slice of the
+        range.
+        """
+        if (start is not None and num is None) or \
+                (num is not None and start is None):
+            raise RedisError("``start`` and ``num`` must both be specified")
+        pieces = ['ZRANGEBYLEX', name, min, max]
+        if start is not None and num is not None:
+            pieces.extend([Token('LIMIT'), start, num])
+        return self.execute_command(*pieces)
+
+    def zremrangebylex(self, name, min, max):
+        """
+        Remove all elements in the sorted set ``name`` between the
+        lexicographical range specified by ``min`` and ``max``.
+
+        Returns the number of elements removed.
+        """
+        return self.execute_command('ZREMRANGEBYLEX', name, min, max)
+
+    def zlexcount(self, name, min, max):
+        """
+        Return the number of items in the sorted set ``name`` between the
+        lexicographical range ``min`` and ``max``.
+        """
+        return self.execute_command('ZLEXCOUNT', name, min, max)
+
+
     # SPECIAL COMMANDS SUPPORTED BY LEDISDB
     def zclear(self, name):
         "Delete key of ``name`` from sorted set"
diff --git a/client/nodejs/ledis/lib/commands.js b/client/nodejs/ledis/lib/commands.js
index f116444..8a24f6c 100644
--- a/client/nodejs/ledis/lib/commands.js
+++ b/client/nodejs/ledis/lib/commands.js
@@ -93,6 +93,9 @@ module.exports = [
 	"zscore",
     "zunionstore",
     "zinterstore",
+    "zrangebylex",
+    "zremrangebylex",
+    "zlexcount",
 
 
 	"zclear",
diff --git a/client/openresty/ledis.lua b/client/openresty/ledis.lua
index 07c3f2b..7834c2b 100644
--- a/client/openresty/ledis.lua
+++ b/client/openresty/ledis.lua
@@ -95,6 +95,12 @@ local commands = {
     "zrevrank", 
     "zrevrangebyscore", 
     "zscore", 
+    "zunionstore",
+    "zinterstore",
+    "zrangebylex",
+    "zremrangebylex",
+    "zlexcount",
+    
     --[[ledisdb special commands]]
     "zclear", 
     "zmclear",
diff --git a/cmd/ledis-cli/const.go b/cmd/ledis-cli/const.go
index b89e757..3bca898 100644
--- a/cmd/ledis-cli/const.go
+++ b/cmd/ledis-cli/const.go
@@ -1,4 +1,4 @@
-//This file was generated by .tools/generate_commands.py on Mon Sep 29 2014 14:19:33 +0800 
+//This file was generated by .tools/generate_commands.py on Thu Oct 02 2014 15:24:07 +0800 
 package main
 
 var helpCommands = [][]string{
@@ -106,12 +106,15 @@ var helpCommands = [][]string{
 	{"ZEXPIREAT", "key timestamp", "ZSet"},
 	{"ZINCRBY", "key increment member", "ZSet"},
 	{"ZINTERSTORE", "destkey numkeys key [key ...] [WEIGHTS weight [weight ...]] [AGGREGATE SUM|MIN|MAX]", "ZSet"},
+	{"ZLEXCOUNT", "key min max", "ZSet"},
 	{"ZMCLEAR", "key [key ...]", "ZSet"},
 	{"ZPERSIST", "key", "ZSet"},
 	{"ZRANGE", "key start stop [WITHSCORES]", "ZSet"},
+	{"ZRANGEBYLEX", "key min max [LIMIT offset count]", "ZSet"},
 	{"ZRANGEBYSCORE", "key min max [WITHSCORES] [LIMIT offset count]", "ZSet"},
 	{"ZRANK", "key member", "ZSet"},
 	{"ZREM", "key member [member ...]", "ZSet"},
+	{"ZREMRANGBYLEX", "key min max", "ZSet"},
 	{"ZREMRANGEBYRANK", "key start stop", "ZSet"},
 	{"ZREMRANGEBYSCORE", "key min max", "ZSet"},
 	{"ZREVRANGE", "key start stop [WITHSCORES]", "ZSet"},