Oracle SQL script giving error. I try to create table - sql

Question

I have script in Oracle SQL:
CREATE TABLE "CONNECTIONS_DB"
("USER" VARCHAR2(4) NOT NULL,
"TIME" DATE NOT NULL,
"STATUS" BOOLEAN NOT NULL,
CONSTRAINT "CONNECTIONS_DB_PK" PRIMARY KEY ("USER", "TIME", "STATUS"),
);
and it returns next error:
Error starting at line : 616 in command -
CREATE TABLE "CONNECTIONS_DB"
("USER" VARCHAR2(4) NOT NULL,
"TIME" DATE NOT NULL,
"STATUS" BOOLEAN NOT NULL,
CONSTRAINT "CONNECTIONS_DB_PK" PRIMARY KEY ("USER", "TIME", "STATUS"),
)
Error report -
ORA-00904: : недопустимый идентификатор
00904. 00000 - "%s: invalid identifier"
*Cause:
*Action:
How to fix this?

Answer 1

Problems with your code:
1) there is a trailing comma at the end of the line that declares the CONSTRAINT
2) datatype BOOLEAN does not exists in Oracle; you can use NUMBER(1) instead
Consider:
CREATE TABLE "CONNECTIONS_DB" (
"USER" VARCHAR2(4) NOT NULL,
"TIME" DATE NOT NULL,
"STATUS" NUMBER(1) NOT NULL,
CONSTRAINT CONNECTIONS_DB_PK PRIMARY KEY ("USER", "TIME", "STATUS")
);
Side note: USER is a reserved word in Oracle. I would suggest using another identifier (like USERNAME), and removing the double quotes around the identifiers. This will save you the work of double quoting that column in all further queries:
CREATE TABLE CONNECTIONS_DB (
USERNAME VARCHAR2(4) NOT NULL,
TIME DATE NOT NULL,
STATUS NUMBER(1) NOT NULL,
CONSTRAINT CONNECTIONS_DB_PK PRIMARY KEY (USERNAME, TIME, STATUS)
);
Demo on DB Fiddle