sql demo

2017-12-16 17:19:48 +08:00
parent 194696b18a
commit ea28c48b4e
1 changed files with 2 additions and 2 deletions
@@ -161,6 +161,6 @@ SELECT ENAME,SAL,SAL+IFNULL(BOUNS,0) FROM EMP_XWBING;//MYSQL
 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;
-IF(ISNULL(p1),p2,p3) 若p1为null
-SELECT ENAME,SAL,IF(ISNULL(BOUNS),'无奖金','有奖金') FROM EMP_XWBING;//MYSQL ISNULL(字段) true返回1
+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
+SELECT ENAME,SAL,IF(ISNULL(BOUNS),'无奖金','有奖金') FROM EMP_XWBING;