readded in correct case

Structural/FluentInterface/Sql.php

@@ -0,0 +1,80 @@
+<?php
+
+namespace DesignPatterns\Structural\FluentInterface;
+
+/**
+ * class SQL
+ */
+class Sql
+{
+    /**
+     * @var array
+     */
+    protected $fields = array();
+
+    /**
+     * @var array
+     */
+    protected $from = array();
+
+    /**
+     * @var array
+     */
+    protected $where = array();
+
+    /**
+     * adds select fields
+     *
+     * @param array $fields
+     *
+     * @return SQL
+     */
+    public function select(array $fields = array())
+    {
+        $this->fields = $fields;
+
+        return $this;
+    }
+
+    /**
+     * adds a FROM clause
+     *
+     * @param string $table
+     * @param string $alias
+     *
+     * @return SQL
+     */
+    public function from($table, $alias)
+    {
+        $this->from[] = $table . ' AS ' . $alias;
+
+        return $this;
+    }
+
+    /**
+     * adds a WHERE condition
+     *
+     * @param string $condition
+     *
+     * @return SQL
+     */
+    public function where($condition)
+    {
+        $this->where[] = $condition;
+
+        return $this;
+    }
+
+    /**
+     * Gets the query, just an example of building a query, 
+     * no check on consistency
+     *
+     * @return string
+     */
+    public function getQuery()
+    {
+        return 'SELECT ' . implode(',', $this->fields)
+                . ' FROM ' . implode(',', $this->from)
+                . ' WHERE ' . implode(' AND ', $this->where);
+    }
+}