mysql 导出指定表的有条件数据到可执行sql文件

在mysql中可用mysqldump导出可执行sql文件，主要适用于导出数据库中数据表的全部数据，当需要导出有条件数据时可增加--where选项进行限定。

现有如下数据表：

cp.users.png

执行不带--where的导出语句：

without_where_sql.png

得到的结果大概如下：

-- MySQL dump 10.13  Distrib 5.7.11, for Win64 (x86_64)
--
-- Host: localhost    Database: cp
-- ------------------------------------------------------
-- Server version   5.7.11-log

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

--
-- Table structure for table `users`
--

DROP TABLE IF EXISTS `users`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `users` (
    `id` int(11) NOT NULL AUTO_INCREMENT,
    `username` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
    `password` char(40) COLLATE utf8_unicode_ci NOT NULL,
    `group_id` int(11) NOT NULL,
    `created` datetime DEFAULT NULL,
    `modified` datetime DEFAULT NULL,
    PRIMARY KEY (`id`),
    UNIQUE KEY `username` (`username`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
/*!40101 SET character_set_client = @saved_cs_client */;

--
-- Dumping data for table `users`
--

LOCK TABLES `users` WRITE;
/*!40000 ALTER TABLE `users` DISABLE KEYS */;
INSERT INTO `users` VALUES (2,'test1','21a444dae7d1b3e589a6f96f8ffb4451e0f1d904',3,'2016-02-29 10:37:49','2016-02-29 10:37:49'),(3,'test2','fe2620bc97887ef2da95d2a9580cc5ef376eaf9b',2,'2016-02-29 10:38:43','2016-02-29 10:38:43'),(4,'test3','7b08a20898f560f30b0f5b8ecde663d098cebef6',3,'2016-02-29 10:39:59','2016-02-29 10:39:59');
/*!40000 ALTER TABLE `users` ENABLE KEYS */;
UNLOCK TABLES;
/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;

/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

-- Dump completed on 2016-09-08 11:51:23

执行带`--where`的导出语句：

![with_where_sql.png](http://upload-images.jianshu.io/upload_images/2050891-bfc463c2006c8da4.png?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)

得到的结果大概如下：

-- MySQL dump 10.13  Distrib 5.7.11, for Win64 (x86_64)
--
-- Host: localhost    Database: cp
-- ------------------------------------------------------
-- Server version   5.7.11-log

/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
/*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;
/*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
/*!40103 SET TIME_ZONE='+00:00' */;
/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;

--
-- Table structure for table `users`
--

DROP TABLE IF EXISTS `users`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `users` (
    `id` int(11) NOT NULL AUTO_INCREMENT,
    `username` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
    `password` char(40) COLLATE utf8_unicode_ci NOT NULL,
    `group_id` int(11) NOT NULL,
    `created` datetime DEFAULT NULL,
    `modified` datetime DEFAULT NULL,
    PRIMARY KEY (`id`),
    UNIQUE KEY `username` (`username`)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
/*!40101 SET character_set_client = @saved_cs_client */;

--
-- Dumping data for table `users`
--
-- WHERE:  id > 2

LOCK TABLES `users` WRITE;
/*!40000 ALTER TABLE `users` DISABLE KEYS */;
INSERT INTO `users` VALUES (3,'test2','fe2620bc97887ef2da95d2a9580cc5ef376eaf9b',2,'2016-02-29 10:38:43','2016-02-29 10:38:43'),(4,'test3','7b08a20898f560f30b0f5b8ecde663d098cebef6',3,'2016-02-29 10:39:59','2016-02-29 10:39:59');
/*!40000 ALTER TABLE `users` ENABLE KEYS */;
UNLOCK TABLES;
/*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;

/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

-- Dump completed on 2016-09-08 11:59:26