diff --git a/lib/tasks/sql_review.rake b/lib/tasks/sql_review.rake
new file mode 100644
index 000000000..761e6be60
--- /dev/null
+++ b/lib/tasks/sql_review.rake
@@ -0,0 +1,19 @@
+# 西部地区学校总数
+# select distinct(s.province), s.name from user_extensions ue, schools s where ue.school_id=s.id and s.province in ('四川','重庆','贵州','云南','西藏','陕西','甘肃','青海','宁夏','新疆广西','内蒙古')
+#
+# 西部地区
+# select count(*) from courses where school_id in (select distinct(s.id) from user_extensions ue, schools s where ue.school_id=s.id and s.province in ('四川','重庆','贵州','云南','西藏','陕西','甘肃','青海','宁夏','新疆广西','内蒙古') group by s.name)
+# 用课门次=课程总数*45*12
+#
+# 西部学习总人数
+# select count(*) from user_extensions ue  where ue.school_id in (select id from schools s where s.province in ('四川','重庆','贵州','云南','西藏','陕西','甘肃','青海','宁夏','新疆广西','内蒙古') group by s.name)
+# 学习人次=西部实际学习总人数/平台实际用户总数 * 平台总学习人次
+#
+# select distinct(s.province), s.name from user_extensions ue, schools s where ue.school_id=s.id and ue.location in ('四川','重庆','贵州','云南','西藏','陕西','甘肃','青海','宁夏','新疆广西','内蒙古')
+#
+# select distinct(id) from courses where school_id in (select distinct(school_id) from user_extensions where location in ('四川','重庆','贵州','云南','西藏','陕西','甘肃','青海','宁夏','新疆广西','内蒙古'))
+#
+# select count(*) from course_members where course_id in (select distinct(id) from courses where school_id in (select distinct(school_id) from user_extensions where location in ('四川','重庆','贵州','云南','西藏','陕西','甘肃','青海','宁夏','新疆广西','内蒙古')))
+#
+# # 西部地区学习人数
+# select count(*) from user_extensions where location in ('四川','重庆','贵州','云南','西藏','陕西','甘肃','青海','宁夏','新疆广西','内蒙古')
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