如何查看sql中的数据

mysql -u your_username -p your_database

SELECT * FROM your_table;

psql -U your_username -d your_database

SELECT * FROM your_table;

import sqlite3

# 连接到数据库
conn = sqlite3.connect('your_database.db')
cursor = conn.cursor()

# 执行查询
cursor.execute("SELECT * FROM your_table")
rows = cursor.fetchall()

for row in rows:
    print(row)

# 关闭连接
conn.close()

import java.sql.*;

public class Main {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/your_database";
        String user = "your_username";
        String password = "your_password";

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery("SELECT * FROM your_table");

            while (rs.next()) {
                System.out.println(rs.getString("column_name"));
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}