diff --git a/boot-service/src/main/java/com/xwbing/demo/oracle/day02.sql b/boot-service/src/main/java/com/xwbing/demo/oracle/day02.sql
index e17bdac..19211ea 100644
--- a/boot-service/src/main/java/com/xwbing/demo/oracle/day02.sql
+++ b/boot-service/src/main/java/com/xwbing/demo/oracle/day02.sql
@@ -49,14 +49,13 @@ n,m不写默认都是1
 SELECT INSTR('think in java','in')FROM dual;
 SELECT INSTR('think in java','in',2,2)FROM dual;
 
-
-
-
 SELECT ENAME,SAL,DEPTNO FROM emp_xwbing WHERE LOWER(ENAME)='smith';
 SELECT ename,sal FROM emp_xwbing WHERE LENGTH(ename)=5;
 SELECT ename,sal FROM emp_xwbing WHERE SUBSTR(ename,1,1)='A';
 
 
+
+
 数字函数
 ROUND(n,[,m])对n进行四舍五入,保留到小数点后m位
 m可以不写的,不写默认值为0
@@ -78,6 +77,8 @@ SELECT CEIL(44.5) FROM DUAL;
 SELECT FLOOR(44.5) FROM DUAL;
 
 
+
+
 日期类型
 DATE:7个字节,保存世纪,年月日时分秒
 TIMESTAMP:时间戳,比DATE多4个字节,可以保存秒以下的精度,前7个字节与DATE一致
@@ -148,6 +149,8 @@ UPDATE student_xwbing SET gender='m' WHERE gender IS NULL;
 UPDATE student_xwbing SET gender=NULL WHERE gender='m';
 
 
+
+
 NULL的运算
 NULL与字符串连接等于什么都没做
 NULL与数字运算结果还是NULL
diff --git a/boot-service/src/main/java/com/xwbing/demo/oracle/day03.sql b/boot-service/src/main/java/com/xwbing/demo/oracle/day03.sql
index 9081965..c989c15 100644
--- a/boot-service/src/main/java/com/xwbing/demo/oracle/day03.sql
+++ b/boot-service/src/main/java/com/xwbing/demo/oracle/day03.sql
@@ -2,6 +2,8 @@ SELECT 子句中 可以对字段加别名,别名前加空格或as,若希望别
 SELECT ENAME,SAL*12 SAL FROM EMP_XWBING;
 SELECT ename,sal*12 AS "S al" FROM emp_xwbing;
 
+
+
 查询条件:
 <>不等于
 SELECT ename,sal FROM emp_xwbing WHERE sal<2000;
@@ -33,8 +35,6 @@ SELECT * FROM emp_xwbing WHERE comm IS NOT NULL AND sal>1300;
 ANY,ALL  需要配合> >=  < <=  一个列表使用,常用于判断子查询的结果
 SELECT * FROM emp_xwbing WHERE sal>ALL(2800,3000,1800);
 
-
-
 DISTINCT 过滤重复,必须跟在SELECT后面.可以对多列去重,去重原则是这些列的组合没有重复
 SELECT DISTINCT job FROM emp_xwbing;
 SELECT DISTINCT job,deptno FROM emp_xwbing;