diff --git a/lib/sql.js b/lib/sql.js
index d9848ec..74e6b63 100644
--- a/lib/sql.js
+++ b/lib/sql.js
@@ -554,13 +554,10 @@ SQLConnector.prototype.buildDelete = function(model, where, options) {
  * @param {Function} cb The callback function
  */
 SQLConnector.prototype.destroyAll = function(model, where, options, cb) {
-  var self = this;
   var stmt = this.buildDelete(model, where, options);
-  this.execute(stmt.sql, stmt.params, options, function(err, info) {
-    var affectedRows = self.getCountForAffectedRows(model, info);
-    if (cb) {
-      cb(err, {count: affectedRows});
-    }
+  this._executeAlteringQuery(model, stmt.sql, stmt.params, options, function(err, data) {
+    if (cb)
+      cb(err, data);
   });
 };
 
@@ -582,14 +579,40 @@ Connector.defineAliases(SQLConnector.prototype, 'destroyAll', ['deleteAll']);
  * @private
  */
 SQLConnector.prototype.updateAttributes = function(model, id, data, options, cb) {
-  if (!isIdValuePresent(id, cb)) {
-    return;
-  }
+  if (!isIdValuePresent(id, cb)) return;
+  var where = this._buildWhereObjById(model, id, data);
+  this.updateAll(model, where, data, options, cb);
+};
+
+/**
+ * Replace attributes for a given model instance
+ * @param {String} model The model name
+ * @param {*} id The id value
+ * @param {Object} data The model data instance containing all properties to
+ * be replaced
+ * @param {Object} options Options object
+ * @param {Function} cb The callback function
+ * @private
+ */
+SQLConnector.prototype.replace = function(model, id, data, options, cb) {
+  if (!isIdValuePresent(id, cb)) return;
+  var where = this._buildWhereObjById(model, id, data);
+  this._replace(model, where, data, options, cb);
+};
+
+/*
+ * @param model The model name.
+ * @param id The instance ID.
+ * @param {Object} data The data Object.
+ * @returns {Object} where The where object for a spcific instance.
+ * @private
+ */
+SQLConnector.prototype._buildWhereObjById = function(model, id, data) {
   var idName = this.idName(model);
   delete data[idName];
   var where = {};
   where[idName] = id;
-  this.updateAll(model, where, data, options, cb);
+  return where;
 };
 
 /**
@@ -601,8 +624,33 @@ SQLConnector.prototype.updateAttributes = function(model, id, data, options, cb)
  * @param {Function} cb The callback function
  * @returns {ParameterizedSQL} The UPDATE SQL statement
  */
-SQLConnector.prototype.buildUpdate = function(model, where, data, options) {
+SQLConnector.prototype._buildUpdate = function(model, where, data, options) {
   var fields = this.buildFieldsForUpdate(model, data);
+  return this._constructUpdateQuery(model, where, fields);
+};
+
+/**
+ * Build the UPDATE statement for replacing
+ * @param {String} model The model name
+ * @param {Object} where The where object
+ * @param {Object} data The data to be changed
+ * @param {Object} options The options object
+ * @param {Function} cb The callback function
+ * @returns {ParameterizedSQL} The UPDATE SQL statement for replacing fields
+ */
+SQLConnector.prototype._buildReplace = function(model, where, data, options) {
+  var fields = this.buildFieldsForReplace(model, data);
+  return this._constructUpdateQuery(model, where, fields);
+};
+
+/*
+ * @param model The model name.
+ * @param {} where The where object.
+ * @param {Object} field The parameterizedSQL fileds.
+ * @returns {Object} update query Constructed update query.
+ * @private
+ */
+SQLConnector.prototype._constructUpdateQuery = function(model, where, fields) {
   var updateClause = new ParameterizedSQL('UPDATE ' + this.tableEscaped(model));
   var whereClause = this.buildWhere(model, where);
   updateClause.merge([fields, whereClause]);
@@ -619,18 +667,38 @@ SQLConnector.prototype.buildUpdate = function(model, where, data, options) {
  * @param {Function} cb The callback function
  */
 SQLConnector.prototype.update = function(model, where, data, options, cb) {
-  var self = this;
-  var stmt = this.buildUpdate(model, where, data, options);
-  this.execute(stmt.sql, stmt.params, options, function(err, info) {
-    var affectedRows = self.getCountForAffectedRows(model, info);
-    if (cb) {
-      cb(err, {count: affectedRows});
-    }
+  var stmt = this._buildUpdate(model, where, data, options);
+  this._executeAlteringQuery(model, stmt.sql, stmt.params, options, function(err, data) {
+    if (cb)
+      cb(err, data);
   });
 };
 
-// Alias to `update`. Juggler checks `update` only.
+/**
+ * Replace all instances that match the where clause with the given data
+ * @param {String} model The model name
+ * @param {Object} where The where object
+ * @param {Object} data The property/value object representing changes
+ * to be made
+ * @param {Object} options The options object
+ * @param {Function} cb The callback function
+ */
+SQLConnector.prototype._replace = function(model, where, data, options, cb) {
+  var stmt = this._buildReplace(model, where, data, options);
+  this._executeAlteringQuery(model, stmt.sql, stmt.params, options, cb);
+};
+
+SQLConnector.prototype._executeAlteringQuery = function(model, sql, params, options, cb) {
+  var self = this;
+  this.execute(sql, params, options, function(err, info) {
+    var affectedRows = self.getCountForAffectedRows(model, info);
+    cb(err, {count: affectedRows});
+  });
+};
+
+// Alias to `update` and `replace`. Juggler checks `update` and `replace` only.
 Connector.defineAliases(SQLConnector.prototype, 'update', ['updateAll']);
+Connector.defineAliases(SQLConnector.prototype, 'replace', ['replaceAll']);
 
 /**
  * Build the SQL WHERE clause for the where object
@@ -877,13 +945,38 @@ SQLConnector.prototype.buildOrderBy = function(model, order) {
  * @returns {{names: Array, values: Array, properties: Array}}
  */
 SQLConnector.prototype.buildFields = function(model, data, excludeIds) {
+//  var props = this.getModelDefinition(model).properties;
+  var keys = Object.keys(data);
+  return this._createFields(model, data, keys, excludeIds);
+};
+
+/**
+ * Build an array of fields for the replace database operation
+ * @param {String} model Model name
+ * @param {Object} data Model data object
+ * @param {Boolean} excludeIds Exclude id properties or not, default to false
+ * @returns {{names: Array, values: Array, properties: Array}}
+ */
+SQLConnector.prototype._buildReplaceFields = function(model, data, excludeIds) {
+  var props = this.getModelDefinition(model).properties;
+  var keys = Object.keys(props);
+  return this._createFields(model, data, keys, excludeIds);
+};
+
+/*
+ * @param {String} model The model name.
+ * @returns {Object} data The model data object.
+ * @returns {Array} keys The key fields for which need to be built.
+ * @param {Boolean} excludeIds Exclude id properties or not, default to false
+ * @private
+ */
+SQLConnector.prototype._createFields = function(model, data, keys, excludeIds) {
+  var props = this.getModelDefinition(model).properties;
   var fields = {
     names: [], // field names
     columnValues: [], // an array of ParameterizedSQL
     properties: [] // model properties
-  };
-  var props = this.getModelDefinition(model).properties;
-  var keys = Object.keys(data);
+  };  
   for (var i = 0, n = keys.length; i < n; i++) {
     var key = keys[i];
     var p = props[key];
@@ -892,10 +985,10 @@ SQLConnector.prototype.buildFields = function(model, data, excludeIds) {
       debug('Unknown property %s is skipped for model %s', key, model);
       continue;
     }
+
     if (excludeIds && p.id) {
       continue;
     }
-
     var k = this.columnEscaped(model, key);
     var v = this.toColumnValue(p, data[key]);
     if (v !== undefined) {
@@ -912,17 +1005,41 @@ SQLConnector.prototype.buildFields = function(model, data, excludeIds) {
 };
 
 /**
- * Build the SET clause for database update
- * @param {String} model Model na
- * @param {Object} data The model data object
- * @param {Boolean} excludeIds Exclude id properties or not, default to true
- * @returns {string} The list of fields for update
+ * Build the SET clause for database update.
+ * @param {String} model Model name.
+ * @param {Object} data The model data object.
+ * @param {Boolean} excludeIds Exclude id properties or not, default to true.
+ * @returns {string} The list of fields for update query.
  */
 SQLConnector.prototype.buildFieldsForUpdate = function(model, data, excludeIds) {
   if (excludeIds === undefined) {
     excludeIds = true;
   }
   var fields = this.buildFields(model, data, excludeIds);
+  return this._constructUpdateParameterizedSQL(fields);
+};
+
+/**
+ * Build the SET clause for database replace through update query.
+ * @param {String} model Model name.
+ * @param {Object} data The model data object.
+ * @param {Boolean} excludeIds Exclude id properties or not, default to true.
+ * @returns {string} The list of fields for update query.
+ */
+SQLConnector.prototype.buildFieldsForReplace = function(model, data, excludeIds) {
+  if (excludeIds === undefined) {
+    excludeIds = true;
+  }
+  var fields = this._buildReplaceFields(model, data, excludeIds);
+  return this._constructUpdateParameterizedSQL(fields);
+};
+
+/*
+ * @param {Object} field The fileds.
+ * @returns {Object} parameterizedSQL.
+ * @private
+ */
+SQLConnector.prototype._constructUpdateParameterizedSQL = function(fields) {
   var columns = new ParameterizedSQL('');
   for (var i = 0, n = fields.names.length; i < n; i++) {
     var clause = ParameterizedSQL.append(fields.names[i],
diff --git a/test/sql.test.js b/test/sql.test.js
index dd89e1e..0d84392 100644
--- a/test/sql.test.js
+++ b/test/sql.test.js
@@ -281,7 +281,7 @@ describe('sql connector', function() {
   });
 
   it('builds UPDATE', function() {
-    var sql = connector.buildUpdate('customer', {name: 'John'}, {vip: false});
+    var sql = connector._buildUpdate('customer', {name: 'John'}, {vip: false});
     expect(sql.toJSON()).to.eql({
       sql: 'UPDATE `CUSTOMER` SET `VIP`=$1 WHERE `NAME`=$2',
       params: [false, 'John']