I don't understand how to choose a database in MySQL.(Error 1056)

Question

CREATE TABLE User(
    id INT PRIMARY KEY,
    names VARCHAR(100),
    aling VARCHAR(30),
    eye VARCHAR(30),
    hair VARCHAR(30),
    gender VARCHAR(30),
    apperences INT,
    year INT,
    universal VARCHAR(10)
)

everywhere I look, such an example is shown... and nowhere does it say how to choose a database. even with a direct request

21:42:26

CREATE TABLE User(
   id INT PRIMARY KEY,
   names VARCHAR(100),
   aling VARCHAR(30),
   eye VARCHAR(30),
   hair VARCHAR(30),
   gender VARCHAR(30),
   apperences INT,
   year INT,
   universal VARCHAR(10)
)

Error Code: 1046. No database selected Select the default DB to be used by double-clicking its name in the SCHEMAS list in the sidebar. 0.000 sec

I expected that I would just write and everything would work, but no