oracle数据库代码怎么执行,C#连接Oracle数据库（执行增删改查操作）

要执行Oracle数据库代码，首先需要安装Oracle数据库客户端并设置环境变量，然后使用SQL*Plus或SQL Developer等工具连接数据库并执行代码。以下是C#连接Oracle数据库并执行增删改查操作的示例代码：

using System;
using System.Data;
using Oracle.ManagedDataAccess.Client;

namespace OracleDemo
{
    class Program
    {
        static void Main(string[] args)
        {
            string connectionString = "Data Source=<database>;User Id=<username>;Password=<password>";
            string query = "SELECT * FROM <table>";

            using (OracleConnection connection = new OracleConnection(connectionString))
            {
                connection.Open();

                // 查询数据
                using (OracleDataAdapter adapter = new OracleDataAdapter(query, connection))
                {
                    DataTable dataTable = new DataTable();
                    adapter.Fill(dataTable);
                    foreach (DataRow row in dataTable.Rows)
                    {
                        Console.WriteLine(row["<column>"]);
                    }
                }

                // 插入数据
                using (OracleCommand command = new OracleCommand("INSERT INTO <table> (<column1>, <column2>) VALUES (:value1, :value2)", connection))
                {
                    command.Parameters.Add(":value1", OracleDbType.Varchar2).Value = "<value1>";
                    command.Parameters.Add(":value2", OracleDbType.Int32).Value = 123;
                    int rows = command.ExecuteNonQuery();
                    Console.WriteLine(rows + " rows inserted");
                }

                // 更新数据
                using (OracleCommand command = new OracleCommand("UPDATE <table> SET <column> = :value WHERE <condition>", connection))
                {
                    command.Parameters.Add(":value", OracleDbType.Varchar2).Value = "<new value>";
                    int rows = command.ExecuteNonQuery();
                    Console.WriteLine(rows + " rows updated");
                }

                // 删除数据
                using (OracleCommand command = new OracleCommand("DELETE FROM <table> WHERE <condition>", connection))
                {
                    int rows = command.ExecuteNonQuery();
                    Console.WriteLine(rows + " rows deleted");
                }

                connection.Close();
            }

            Console.ReadLine();
        }
    }
}

其中，`<database>`、`<username>`、`<password>`、`<table>`、`<column>`、`<value>`和`<condition>`需要替换为实际的值。可以根据需要调整数据类型和参数名称。