minor fix

billryan · Jul 7, 2015 · 90d0dc3 · 90d0dc3
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diff --git a/SUMMARY.md b/SUMMARY.md
@@ -35,11 +35,13 @@
    * [数据挖掘与分析](chapter7-textbooks/data-mining.md)
    * [Spark](chapter7-textbooks/spark.md)
    * [杂项](chapter7-textbooks/misc.md)
-* [Part II Programming Notes](part_ii_programming_notes/README)
+* [Part II Programming Notes](part_ii_programming_notes/README.md)
 * [C++ Notes](cplusplus_notes/README.md)
    * [vector](cplusplus_notes/vector.md)
    * [variable](cplusplus_notes/variable.md)
    * [const](cplusplus_notes/const.md)
 * [Database](database/README.md)
    * [MySQL](database/mysql.md)
+* [OS Notes](os_notes/README.md)
+   * [fork](os_notes/fork.md)
 
diff --git a/database/mysql.md b/database/mysql.md
@@ -423,3 +423,7 @@ mysql> SELECT prod_id, quantity, item_price,
 ```
 
 输出中显示的`expanded_price`为计算字段。
+
+## 使用数据处理函数
+
+
Original file line number	Diff line number	Diff line change
Expand Up		@@ -423,3 +423,7 @@ mysql> SELECT prod_id, quantity, item_price,
		```

		输出中显示的`expanded_price`为计算字段。

		## 使用数据处理函数