需要一些SQL查询的帮助

CREATE DATABASE database_name;

CREATE TABLE table_name (
    column1 datatype1,
    column2 datatype2,
    column3 datatype3,
    ...
);

INSERT INTO table_name (column1, column2, column3, ...)
VALUES (value1, value2, value3, ...);

SELECT column1, column2, column3, ...
FROM table_name;

UPDATE table_name
SET column1 = value1, column2 = value2, column3 = value3, ...
WHERE condition;

DELETE FROM table_name
WHERE condition;

SELECT table1.column1, table2.column2, table3.column3, ...
FROM table1
INNER JOIN table2 ON table1.common_column = table2.common_column
INNER JOIN table3 ON table1.common_column = table3.common_column;