c# sql MySqlConnection 获取表下面组的名称 和组下面表的名称
时间: 2024-04-08 12:30:46 浏览: 24
在C#中,使用MySql.Data.MySqlClient命名空间中的MySqlConnection类可以连接到MySQL数据库。以下是获取表下面组名称和组下面表名称的示例代码:
```csharp
using System;
using MySql.Data.MySqlClient;
class Program
{
static void Main()
{
string connectionString = "Server=YourServerAddress;Database=YourDatabaseName;Uid=YourUsername;Pwd=YourPassword;"; // 替换为你的数据库连接字符串
using (MySqlConnection connection = new MySqlConnection(connectionString))
{
connection.Open();
// 查询表下面的组名称
string groupQuery = "SELECT DISTINCT g.group_name FROM information_schema.tables t INNER JOIN information_schema.user_privileges p ON t.table_schema = p.table_schema AND t.table_name = p.table_name INNER JOIN mysql.user u ON p.grantee = CONCAT('''', u.user, '''@''', u.host, '''') INNER JOIN mysql.db d ON d.user = u.user INNER JOIN mysql.tables_priv tp ON tp.db = d.db AND tp.user = u.user INNER JOIN mysql.roles r ON r.host = u.host AND r.user = u.user INNER JOIN mysql.user_group g ON g.role_id = r.id WHERE t.table_name = 'YourTableName';"; // 替换为你的表名
using (MySqlCommand groupCommand = new MySqlCommand(groupQuery, connection))
{
using (MySqlDataReader groupReader = groupCommand.ExecuteReader())
{
Console.WriteLine("组名称:");
while (groupReader.Read())
{
string groupName = groupReader.GetString(0);
Console.WriteLine(groupName);
}
}
}
// 查询组下面的表名称
string tableQuery = "SELECT DISTINCT t.table_name FROM information_schema.tables t INNER JOIN information_schema.user_privileges p ON t.table_schema = p.table_schema AND t.table_name = p.table_name INNER JOIN mysql.user u ON p.grantee = CONCAT('''', u.user, '''@''', u.host, '''') INNER JOIN mysql.db d ON d.user = u.user INNER JOIN mysql.tables_priv tp ON tp.db = d.db AND tp.user = u.user INNER JOIN mysql.roles r ON r.host = u.host AND r.user = u.user INNER JOIN mysql.user_group g ON g.role_id = r.id WHERE g.group_name = 'YourGroupName';"; // 替换为你的组名
using (MySqlCommand tableCommand = new MySqlCommand(tableQuery, connection))
{
using (MySqlDataReader tableReader = tableCommand.ExecuteReader())
{
Console.WriteLine("表名称:");
while (tableReader.Read())
{
string tableName = tableReader.GetString(0);
Console.WriteLine(tableName);
}
}
}
connection.Close();
}
Console.ReadLine();
}
}
```
请将上述代码中的`YourServerAddress`、`YourDatabaseName`、`YourUsername`和`YourPassword`替换为你的MySQL服务器地址、数据库名称、用户名和密码。运行代码后,你将获得表下面的组名称和组下面的表名称。
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