SQLite SQL writing method of creating table joint primary key

Create as follows TStudent surface , Give Way id,.name For union primary key

create table TStudent(
 id INT  primary key not null,
 name VARCHAR(50) primary key not null
);

The following errors will be reported ：

Error：table  "TStudent" has more than one primary key

The correct writing is as follows ：

create table TStudent(
 id INT,
 name VARCHAR(50),
 primary_key(id, name)
);

Union primary key , Write the last line of the statement under construction , stay primary key () In brackets , And separated by commas .