Error in SQL Developer during creating tables - sql

Question

I'm trying to create 3 tables using SQL Developer and have an error. Can't undersand why it happens.
Create table Album
(
"alb_code" integer primary key,
"alb_name" char(50),
"publ" char(50),
"publ_date" date not null
);
Create table Song
(
"song_code" integer primary key,
"song_name" char(50),
"auth" char(50),
"year" integer,
"style" char(30)
);
Create table Song_from_Album
(
"in_alb_code" integer primary key,
"time" float,
"no" integer,
FOREIGN KEY REFERENCES Song("song_code"),
FOREIGN KEY REFERENCES Album("alb_code")
);
I get an error:
Error starting at line : 1 in command -
Create table Album
(
"alb_code" integer primary key,
"alb_name" char(50),
"publ" char(50),
"publ_date" date not null
)
Error at Command Line : 1 Column : 14
Error report -
SQL Error: ORA-00955: имя уже задействовано для существующего объекта
00955. 00000 - "name is already used by an existing object"
*Cause:
*Action:
Error starting at line : 8 in command -
Create table Song
(
"song_code" integer primary key,
"song_name" char(50),
"auth" char(50),
"year" integer,
"style" char(30)
)
Error at Command Line : 8 Column : 14
Error report -
SQL Error: ORA-00955: имя уже задействовано для существующего объекта
00955. 00000 - "name is already used by an existing object"
*Cause:
*Action:
Error starting at line : 16 in command -
Create table Song_from_Album
(
"in_alb_code" integer primary key,
"time" float,
"no" integer,
FOREIGN KEY REFERENCES Song("song_code"),
FOREIGN KEY REFERENCES Album("alb_code")
)
Error at Command Line : 21 Column : 15
Error report -
SQL Error: ORA-00906: отсутствует левая скобка
00906. 00000 - "missing left parenthesis"
*Cause:
*Action:

Answer 1

The first two tables are getting created, but third table has error.
Drop the tables and recreate with correction to third table syntax
The error "missing left parenthesis" is with the foreign key constraint declaration,
Use this instead
CONSTRAINT fk_no FOREIGN KEY ("no") REFERENCES Song("song_code"),
CONSTRAINT fk_alb_code FOREIGN KEY ("in_alb_code") REFERENCES Album("alb_code")
With this change, Song_Album table declaration will be like this
Create table Song_from_Album
(
"in_alb_code" integer primary key,
"time" float,
"no" integer,
CONSTRAINT fk_no FOREIGN KEY ("no") REFERENCES Song("song_code"),
CONSTRAINT fk_alb_code FOREIGN KEY ("in_alb_code") REFERENCES Album("alb_code")
);