MySQL SELECT IF语句使用OR?
您可以将SELECT IF语句与OR一起使用。要了解OR的选择,让我们创建一个表。创建表的查询如下-
mysql> create table EmployeeInformation-> (
-> EmployeeId int,
-> EmployeeName varchar(100),
-> EmployeeStatus varchar(100)
-> );
使用insert命令在表中插入一些记录。查询如下-
mysql> insert into EmployeeInformation values(1,'Sam','FullTime');mysql> insert into EmployeeInformation values(2,'Mike','PartTime');
mysql> insert into EmployeeInformation values(3,'Bob','Intern');
mysql> insert into EmployeeInformation values(4,'Carol','FullTime');
mysql> insert into EmployeeInformation values(5,'John','FullTime');
mysql> insert into EmployeeInformation values(6,'Johnson','PartTime');
mysql> insert into EmployeeInformation values(7,'Maria','Intern');
现在让我们使用select命令显示表中的所有记录。查询如下-
mysql> select *from EmployeeInformation;
输出结果
+------------+--------------+----------------+| EmployeeId | EmployeeName | EmployeeStatus |
+------------+--------------+----------------+
| 1 | Sam | FullTime |
| 2 | Mike | PartTime |
| 3 | Bob | Intern |
| 4 | Carol | FullTime |
| 5 | John | FullTime |
| 6 | Johnson | PartTime |
| 7 | Maria | Intern |
+------------+--------------+----------------+
7 rows in set (0.00 sec)
这是使用OR执行SELECT IF语句的查询。在下面的查询中,您将仅获得具有EmployeeStatus FullTime和Intern的EmployeeName,否则您将获得员工的状态。
查询如下-
mysql> select if(EmployeeStatus='FullTime' orEmployeeStatus='Intern',EmployeeName,EmployeeStatus) as Status from
EmployeeInformation;
输出结果
+----------+| Status |
+----------+
| Sam |
| PartTime |
| Bob |
| Carol |
| John |
| PartTime |
| Maria |
+----------+
7 rows in set (0.00 sec)
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