Question

我已经查看了StackOverflow上00923错误的所有相关问题，但找不到有效的答案，所以我发布了自己的问题。

我正在使用SQL Developer并尝试在下面运行此命令：

SELECT *,(
CASE dayOfWeek
    WHEN 1 THEN "Monday"
    WHEN 2 THEN "Tuesday"
    WHEN 3 THEN "Wednesday"
    WHEN 4 THEN "Thursday"
    WHEN 5 THEN "Friday"
    WHEN 6 THEN "Saturday"
    WHEN 7 THEN "Sunday"
END) AS "dayOfWeek"
FROM Schedules WHERE routeID = 1;

我在数据库中分别以1到7的整数表示星期几。我正在尝试使用此CASE将1到7显示为文本，如上所示，并且我收到此错误。

完整错误：

ORA-00923: FROM keyword not found where expected
00923. 00000 -  "FROM keyword not found where expected"
*Cause:    
*Action:
Error at Line: 1 Column: 9

Answer 1

在SELECT子句中使用*而不仅仅是*时，您需要使用您希望记录的表名来限定*。

SELECT Schedules.*,
CASE dayOfWeek
    WHEN 1 THEN 'Monday'
    WHEN 2 THEN 'Tuesday'
    WHEN 3 THEN 'Wednesday'
    WHEN 4 THEN 'Thursday'
    WHEN 5 THEN 'Friday'
    WHEN 6 THEN 'Saturday'
    WHEN 7 THEN 'Sunday'
END AS "dayOfWeek"

FROM Schedules WHERE routeID = 1;

Answer 2

SELECT Schedules.ScheduleID, Schedules.RouteID,
CASE dayOfWeek
    WHEN 1 THEN 'Monday'
    WHEN 2 THEN 'Tuesday'
    WHEN 3 THEN 'Wednesday'
    WHEN 4 THEN 'Thursday'
    WHEN 5 THEN 'Friday'
    WHEN 6 THEN 'Saturday'
    WHEN 7 THEN 'Sunday'
END AS "dayOfWeek", Schedules.depTime, Schedules.arrTime, Schedules.Status
FROM Schedules WHERE routeID = 1;

Answer 3

当我执行该SQL语句时，在Visual Studio内部，我收到与本文标题中提到的相同的错误。代码片段来自以下方法。

body

ORA-00923：找不到FROM关键字 - SQLDeveloper

3 个答案: