Question

我需要创建一个脚本文件，其中包含我在mysql表中选择的记录的Insert语句。

对于Instance，当我Select * from emp where empid = 5时，说我得到了10条记录。现在我应该创建一个脚本文件，其中包含10条记录的插入语句到emp表。

我使用C＃作为代码...

如何？

Answer 1

那么现在你的问题是有道理的。您可以在一个查询中执行此操作

INSERT INTO B.emp SELECT * FROM A.emp WHERE empid = 5

Answer 2

DELIMITER $$

DROP PROCEDURE IF EXISTS `sample`.`InsGen` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `InsGen`(
in_db varchar(20),
in_table varchar(20),
in_ColumnName varchar(20),
in_ColumnValue varchar(20)
)
BEGIN

declare Whrs varchar(500);
declare Sels varchar(500);
declare Inserts varchar(200);
declare tablename varchar(20);
declare ColName varchar(20);


set tablename=in_table;


# Comma separated column names - used for Select
select group_concat(concat('concat(\'"\',','ifnull(',column_name,','''')',',\'"\')'))
INTO @Sels from information_schema.columns where table_schema=in_db and table_name=tablename;


# Comma separated column names - used for Group By
select group_concat('`',column_name,'`')
INTO @Whrs from information_schema.columns where table_schema=in_db and table_name=tablename;


#Main Select Statement for fetching comma separated table values

 set @Inserts=concat("select concat('insert IGNORE into ", in_db,".",tablename," values(',concat_ws(',',",@Sels,"),');')
 as MyColumn from ", in_db,".",tablename, " where ", in_ColumnName, " = " , in_ColumnValue, " group by ",@Whrs, ";");

 PREPARE Inserts FROM @Inserts;

EXECUTE Inserts;                    

END $$

DELIMITER ;

Answer 3

它适用于Norhtwind.Customer表。

    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Data.Common;
    using System.Data;
    using System.Data.Odbc;
    using System.IO;
    using System.Threading;
    namespace DataAccessLayer
    {      
        public class DBManager
        {   
            //FILE LOGGER METHOD
            public  void SqlLogger(string SqlText)
            {  if (!File.Exists("SQL.txt"))
                {  using (StreamWriter sw = new StreamWriter("SQL.txt"))
                    {   sw.Flush();
                        sw.Close();
                        sw.Dispose();
                    }
                }

                using (StreamWriter sw = File.AppendText("SQL.txt"))
                {   sw.WriteLine(SqlText);
                    sw.WriteLine(" ");
                    sw.Flush();
                    sw.Close();
                    sw.Dispose();
                }

            }

            // DATABASE METHODS
            public static OdbcConnection g_con = new OdbcConnection("Dsn=wsodbc1");      
            public DBManager()
            {

            }
            public OdbcConnection GetConnection()

            {  try   {   g_con.Open();         }
                catch (Exception ex)     {        }
                return g_con;            
            }
            public OdbcCommand GetCommand(string Query)
            {
                OdbcCommand cmd = new OdbcCommand(Query);
                cmd.Connection = GetConnection();
                return cmd;
            }
            public void ExeCommand(string Query)
            {
                OdbcCommand cmd = GetCommand(Query);
                cmd.ExecuteNonQuery();    


            }
            public OdbcDataReader GetReader(string Query)
            {  return GetCommand(Query).ExecuteReader();     }

            // SQL INSERT GENERATOR
            public void GenerateSql(string tablename)
            {
                File.Delete("SQL.txt");
                List<string> cols = new List<string>();
                string ColNames;


                OdbcDataReader reader = GetReader("SELECT     * FROM         Customers ");

                DataTable schemaTable = reader.GetSchemaTable();

                foreach (DataRow row in schemaTable.Rows)
                {   foreach (DataColumn column in schemaTable.Columns)
                {          
                    if (column.ColumnName.Equals("ColumnName")) cols.Add(row[column].ToString().ToUpper());                    
                    }
                }


                    ColNames = string.Join(",", cols.ToArray());


                    while (reader.Read())
                {

                    SqlLogger("INSERT INTO " + tablename + " (" + ColNames + ") VALUES (" + Row_Values(reader) + ")");

                }

            }
            public string Row_Values(OdbcDataReader r)
            {
                    List<string> colsVals = new List<string>();

                    for (int i = 0; i < r.FieldCount; i++ )
                    {

                        if (r[i].GetType().ToString().Equals("System.String"))
                        {
                            if (r[i] == null)
                            {
                                colsVals.Add("NULL");
                            }
                            else
                            {
                                colsVals.Add("'" + r[i].ToString().Replace("'","''").Replace(",","-") + "'");
                            }

                        }
                        else if (r[i].GetType().ToString().Equals("System.DBNull"))
                        {
                            colsVals.Add("NULL");
                        }
                        else

                        {
                            if (r[i] == null)
                            {
                                colsVals.Add("NULL");
                            }
                            else
                            {
                                var VAL = r[i].ToString();
                                colsVals.Add("'" + VAL.ToString().Replace("'", "''").Replace(",", "-") + "'");
                            }

                        }
                    }

                    return string.Join(",", colsVals.ToArray());   
            }
        }
    }

如何使用Insert语句为MySql中选择的记录创建脚本？

3 个答案: