Question

SELECT last_name,salary,department_id FROM HR.EMPLOYEES 
WHERE salary IN('17000','9000') AND DEPARTMENT_ID IN('60','90');
Alter table HR.EMPLOYEES rename column last_name to Employee AND
Alter table HR.EMPLOYEES rename column salary to "Monthly Salary";

我需要将“last_name”重命名为“Employee”，将“salary”重命名为“Monthly Salary”

oracle的消息：SQL命令未正确结束

Answer 1

我会这样做

Alter table HR.EMPLOYEES rename column last_name to Employee ;
Alter table HR.EMPLOYEES rename column salary to "Monthly Salary";

我会摆脱＆＃39; AND＆＃39;并使用＆＃39 ;;＆＃39;

完成命令

Answer 2

您可能只想在查询中使用AS来指定别名：

SELECT last_name AS Employee,
       salary    AS "Monthly Salary",
       department_id
FROM   HR.EMPLOYEES 
WHERE  salary IN('17000','9000')
AND    DEPARTMENT_ID IN('60','90');

但是，您可以单独rename each column：

Alter table HR.EMPLOYEES rename column last_name to Employee;
Alter table HR.EMPLOYEES rename column salary to "Monthly Salary";

（但您应该避免使用区分大小写的列名称 - 否则您必须在每个语句中使用双引号列名称和确切的大小写。）

oracle sql：如何在同一时间重命名2列

2 个答案: