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 56581ae..e17bdac 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
@@ -163,7 +163,8 @@ NVL2(P1,P2,P3) 若p1不为NULL值为p2,p1为NULL值为p3
 查看每个员工的奖金情况?
 SELECT ENAME,SAL,NVL2(BOUNS,'有奖金','无奖金') FROM EMP_XWBING;
 //MYSQL
-IF(ISNULL(p1),p2,p3) 若p1为null值为p2,p1不为null值为p3 //MYSQL ISNULL(字段) true返回1---------
-IF(expr1,expr2,expr3):如果 expr1 是TRUE,则 IF()的返回值为expr2; 否则返回值则为 expr3
+ISNULL(字段) true返回1
+IF(p1,p2,p3):如果p1是true,返回值为p2;否则返回值则为p3
+IF(ISNULL(p1),p2,p3) 若p1为null值为p2,p1不为null值为p3
 SELECT ENAME,SAL,IF(ISNULL(BOUNS),'无奖金','有奖金') FROM EMP_XWBING;