是否使用T-SQL、C#或Python在不超过一次命中表的情况下，对所有列的不同记录值进行计数？

SELECT COUNT(DISTINCT *) FROM 表名;

using (SqlConnection connection = new SqlConnection(connectionString))
{
    connection.Open();
    SqlCommand command = new SqlCommand("SELECT COUNT(DISTINCT *) FROM 表名", connection);
    int count = (int)command.ExecuteScalar();
    Console.WriteLine("不同记录值的计数为：" + count);
}

import pyodbc

connectionString = "Driver={SQL Server};Server=服务器名;Database=数据库名;UID=用户名;PWD=密码"
connection = pyodbc.connect(connectionString)
cursor = connection.cursor()
cursor.execute("SELECT COUNT(DISTINCT *) FROM 表名")
count = cursor.fetchone()[0]
print("不同记录值的计数为：" + str(count))