SQL错误:ORA-00907:缺少右括号 [英] SQL Error: ORA-00907: missing right parenthesis

问题描述

我正在使用Oracle SQL Developer通过以下命令创建基本表:

I am using Oracle SQL developer to create a basic table with the following command:

CREATE TABLE chartered_flight(
   flight_no NUMBER(4) PRIMARY KEY
   , customer_id FOREIGN KEY
   , aircraft_no FOREIGN KEY
   , flight_type VARCHAR2 (12)
   , flight_date DATE NOT NULL
   , flight_time TO_DATE 'HH:MI' NOT NULL
   , takeoff_at CHAR (3) NOT NULL
   , destination CHAR (3) NOT NULL
)

缺少的右括号在哪里?还是我使用的语法不正确.

Where is the missing right parenthesis? Or is the syntax that I have used incorrect.

我进行了以下更改:

CREATE TABLE chartered flight(
   flight_no NUMBER(4) PRIMARY KEY
   , customer_id NUMBER(6) REFERENCES [customer]([customer_id])
   , aircraft_no NUMBER(4) REFERENCES [aircraft]([aircraft_no])
   , flight_type VARCHAR2 (12)
   , flight_date DATE NOT NULL
   , flight_time INTERVAL DAY TO SECOND NOT NULL
   , takeoff_at CHAR (3) NOT NULL
   , destination CHAR (3) NOT NULL)

现在我收到此错误:

Error at Command Line:1 Column:23
Error report:
SQL Error: ORA-00922: missing or invalid option
00922. 00000 -  "missing or invalid option"
*Cause:    
*Action:

我觉得这与TO_DATE有关，或者是因为我尚未创建飞机表，所以缺少aircraft_no吗?有人可以帮忙吗，谢谢.

I have a feeling it is something to do with TO_DATE or is it because I have not created my aircraft table yet so aircraft_no is missing? Can some one please help, thanks.

推荐答案

要指定外键约束，您应该使用内联customer_id [type] REFERENCES [master_table_name]([master_column_name])或外联语法:, CONSTRAINT [constraint_name] FOREIGN KEY(customer_id) REFERENCES [master_table_name]([master_column_name])查看更多示例

To specify foreign key constraint, you should either use inline customer_id [type] REFERENCES [master_table_name]([master_column_name]) or out of line syntax : , CONSTRAINT [constraint_name] FOREIGN KEY(customer_id) REFERENCES [master_table_name]([master_column_name]) See more example here. Also, it usually makes sense to add indexes on foreign key columns.

对于flight_time，您可能需要使用INTERVAL DAY TO SECOND类型

For flight_time you probably need to use INTERVAL DAY TO SECOND type

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