MySQL登录退出与导入导出
登录退出MySQL
- 登录命令
mysql -u 用户名 -p 密码 -h IP -P 端口
mysql -u root -p password -h 127.0.0.1 -P 3306
- 一般登录命令
mysql -u 用户名 -p 密码
mysql -u root -p #如果在-p后没有提供密码，则会在执行命令后要求用户输入密码
完整的命令行选项和参数列表可以用mysql --help获得。
- 退出命令
quit 或 exit
注意事项
- 命令用 ; 或 \g 结束，换句话说，Enter不执行命令；
- 输入 help 或 \h 获得帮助，也可以输入更多的文本获得特定命令帮助；
- 想要取消命令重新输入的话直接输入\c；
- 主机名如果连接到本地服务器，为localhost；
- 默认端口为3306；
导入到处数据
- 导出整个数据库中的所有数据
mysql -u root -p dabaseName > fileName.sql #fileName.sql最好加上路径名
- 导出数据库中的某个表的数据
mysqldump -u userName -p dabaseName tableName > fileName.sql
- 导出整个数据库中的所有的表结构
mysqldump -u userName -p -d dabaseName > fileName.sql
- 导出整个数据库中某个表的表结构
mysqldump -u userName -p -d dabaseName tableName > fileName.sql
- 导入mysql
mysql -uroot -p database < fileName.sql #注意fileName.sql要有路径名
- 导入mysql
mysql>source fileName.sql #注意fileName.sql要有路径名
- 这里有官方sql代码，试着导入MySQL，以下将以这个为例。
/*
Navicat Premium Data Transfer
Source Server : localhost_3306
Source Server Type : MySQL
Source Server Version : 50612
Source Host : localhost:3306
Source Schema : zlx_mysql
Target Server Type : MySQL
Target Server Version : 50612
File Encoding : 65001
Date: 19/12/2019 23:03:46
*/
SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;
-- ----------------------------
-- Table structure for customers
-- ----------------------------
DROP DATABASE IF EXISTS customers;
CREATE DATABASE IF NOT EXISTS customers;
use customers;
DROP TABLE IF EXISTS `customers`;
CREATE TABLE `customers` (
`cust_id` int(11) NOT NULL AUTO_INCREMENT,
`cust_name` char(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL,
`cust_address` char(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
`cust_city` char(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
`cust_state` char(5) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
`cust_zip` char(10) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
`cust_country` char(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
`cust_contact` char(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
`cust_email` char(255) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
PRIMARY KEY (`cust_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 10006 CHARACTER SET = latin1 COLLATE = latin1_swedish_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of customers
-- ----------------------------
INSERT INTO `customers` VALUES (10001, 'Coyote Inc.', '200 Maple Lane', 'Detroit', 'MI', '44444', 'USA', 'Y Lee', 'ylee@coyote.com');
INSERT INTO `customers` VALUES (10002, 'Mouse House', '333 Fromage Lane', 'Columbus', 'OH', '43333', 'USA', 'Jerry Mouse', NULL);
INSERT INTO `customers` VALUES (10003, 'Wascals', '1 Sunny Place', 'Muncie', 'IN', '42222', 'USA', 'Jim Jones', 'rabbit@wascally.com');
INSERT INTO `customers` VALUES (10004, 'Yosemite Place', '829 Riverside Drive', 'Phoenix', 'AZ', '88888', 'USA', 'Y Sam', 'sam@yosemite.com');
INSERT INTO `customers` VALUES (10005, 'E Fudd', '4545 53rd Street', 'Chicago', 'IL', '54545', 'USA', 'E Fudd', NULL);
-- ----------------------------
-- Table structure for orderitems
-- ----------------------------
DROP TABLE IF EXISTS `orderitems`;
CREATE TABLE `orderitems` (
`order_num` int(11) NOT NULL,
`order_item` int(11) NOT NULL,
`prod_id` char(10) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL,
`quantity` int(11) NOT NULL,
`item_price` decimal(8, 2) NOT NULL,
PRIMARY KEY (`order_num`, `order_item`) USING BTREE,
INDEX `fk_orderitems_products`(`prod_id`) USING BTREE,
CONSTRAINT `fk_orderitems_products` FOREIGN KEY (`prod_id`) REFERENCES `products` (`prod_id`) ON DELETE RESTRICT ON UPDATE RESTRICT,
CONSTRAINT `fk_orderitems_orders` FOREIGN KEY (`order_num`) REFERENCES `orders` (`order_num`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE = InnoDB CHARACTER SET = latin1 COLLATE = latin1_swedish_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of orderitems
-- ----------------------------
INSERT INTO `orderitems` VALUES (20005, 1, 'ANV01', 10, 5.99);
INSERT INTO `orderitems` VALUES (20005, 2, 'ANV02', 3, 9.99);
INSERT INTO `orderitems` VALUES (20005, 3, 'TNT2', 5, 10.00);
INSERT INTO `orderitems` VALUES (20005, 4, 'FB', 1, 10.00);
INSERT INTO `orderitems` VALUES (20006, 1, 'JP2000', 1, 55.00);
INSERT INTO `orderitems` VALUES (20007, 1, 'TNT2', 100, 10.00);
INSERT INTO `orderitems` VALUES (20008, 1, 'FC', 50, 2.50);
INSERT INTO `orderitems` VALUES (20009, 1, 'FB', 1, 10.00);
INSERT INTO `orderitems` VALUES (20009, 2, 'OL1', 1, 8.99);
INSERT INTO `orderitems` VALUES (20009, 3, 'SLING', 1, 4.49);
INSERT INTO `orderitems` VALUES (20009, 4, 'ANV03', 1, 14.99);
-- ----------------------------
-- Table structure for orders
-- ----------------------------
DROP TABLE IF EXISTS `orders`;
CREATE TABLE `orders` (
`order_num` int(11) NOT NULL AUTO_INCREMENT,
`order_date` datetime(0) NOT NULL,
`cust_id` int(11) NOT NULL,
PRIMARY KEY (`order_num`) USING BTREE,
INDEX `fk_orders_customers`(`cust_id`) USING BTREE,
CONSTRAINT `fk_orders_customers` FOREIGN KEY (`cust_id`) REFERENCES `customers` (`cust_id`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE = InnoDB AUTO_INCREMENT = 20010 CHARACTER SET = latin1 COLLATE = latin1_swedish_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of orders
-- ----------------------------
INSERT INTO `orders` VALUES (20005, '2005-09-01 00:00:00', 10001);
INSERT INTO `orders` VALUES (20006, '2005-09-12 00:00:00', 10003);
INSERT INTO `orders` VALUES (20007, '2005-09-30 00:00:00', 10004);
INSERT INTO `orders` VALUES (20008, '2005-10-03 00:00:00', 10005);
INSERT INTO `orders` VALUES (20009, '2005-10-08 00:00:00', 10001);
-- ----------------------------
-- Table structure for productnotes
-- ----------------------------
DROP TABLE IF EXISTS `productnotes`;
CREATE TABLE `productnotes` (
`note_id` int(11) NOT NULL AUTO_INCREMENT,
`prod_id` char(10) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL,
`note_date` datetime(0) NOT NULL,
`note_text` text CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL,
PRIMARY KEY (`note_id`) USING BTREE,
FULLTEXT INDEX `note_text`(`note_text`)
) ENGINE = MyISAM AUTO_INCREMENT = 115 CHARACTER SET = latin1 COLLATE = latin1_swedish_ci ROW_FORMAT = Dynamic;
-- ----------------------------
-- Records of productnotes
-- ----------------------------
INSERT INTO `productnotes` VALUES (101, 'TNT2', '2005-08-17 00:00:00', 'Customer complaint:\r\nSticks not individually wrapped, too easy to mistakenly detonate all at once.\r\nRecommend individual wrapping.');
INSERT INTO `productnotes` VALUES (102, 'OL1', '2005-08-18 00:00:00', 'Can shipped full, refills not available.\r\nNeed to order new can if refill needed.');
INSERT INTO `productnotes` VALUES (103, 'SAFE', '2005-08-18 00:00:00', 'Safe is combination locked, combination not provided with safe.\r\nThis is rarely a problem as safes are typically blown up or dropped by customers.');
INSERT INTO `productnotes` VALUES (104, 'FC', '2005-08-19 00:00:00', 'Quantity varies, sold by the sack load.\r\nAll guaranteed to be bright and orange, and suitable for use as rabbit bait.');
INSERT INTO `productnotes` VALUES (105, 'TNT2', '2005-08-20 00:00:00', 'Included fuses are short and have been known to detonate too quickly for some customers.\r\nLonger fuses are available (item FU1) and should be recommended.');
INSERT INTO `productnotes` VALUES (106, 'TNT2', '2005-08-22 00:00:00', 'Matches not included, recommend purchase of matches or detonator (item DTNTR).');
INSERT INTO `productnotes` VALUES (107, 'SAFE', '2005-08-23 00:00:00', 'Please note that no returns will be accepted if safe opened using explosives.');
INSERT INTO `productnotes` VALUES (108, 'ANV01', '2005-08-25 00:00:00', 'Multiple customer returns, anvils failing to drop fast enough or falling backwards on purchaser. Recommend that customer considers using heavier anvils.');
INSERT INTO `productnotes` VALUES (109, 'ANV03', '2005-09-01 00:00:00', 'Item is extremely heavy. Designed for dropping, not recommended for use with slings, ropes, pulleys, or tightropes.');
INSERT INTO `productnotes` VALUES (110, 'FC', '2005-09-01 00:00:00', 'Customer complaint: rabbit has been able to detect trap, food apparently less effective now.');
INSERT INTO `productnotes` VALUES (111, 'SLING', '2005-09-02 00:00:00', 'Shipped unassembled, requires common tools (including oversized hammer).');
INSERT INTO `productnotes` VALUES (112, 'SAFE', '2005-09-02 00:00:00', 'Customer complaint:\r\nCircular hole in safe floor can apparently be easily cut with handsaw.');
INSERT INTO `productnotes` VALUES (113, 'ANV01', '2005-09-05 00:00:00', 'Customer complaint:\r\nNot heavy enough to generate flying stars around head of victim. If being purchased for dropping, recommend ANV02 or ANV03 instead.');
INSERT INTO `productnotes` VALUES (114, 'SAFE', '2005-09-07 00:00:00', 'Call from individual trapped in safe plummeting to the ground, suggests an escape hatch be added.\r\nComment forwarded to vendor.');
-- ----------------------------
-- Table structure for products
-- ----------------------------
DROP TABLE IF EXISTS `products`;
CREATE TABLE `products` (
`prod_id` char(10) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL,
`vend_id` int(11) NOT NULL,
`prod_name` char(255) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL,
`prod_price` decimal(8, 2) NOT NULL,
`prod_desc` text CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL,
PRIMARY KEY (`prod_id`) USING BTREE,
INDEX `fk_products_vendors`(`vend_id`) USING BTREE,
CONSTRAINT `fk_products_vendors` FOREIGN KEY (`vend_id`) REFERENCES `vendors` (`vend_id`) ON DELETE RESTRICT ON UPDATE RESTRICT
) ENGINE = InnoDB CHARACTER SET = latin1 COLLATE = latin1_swedish_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of products
-- ----------------------------
INSERT INTO `products` VALUES ('ANV01', 1001, '.5 ton anvil', 5.99, '.5 ton anvil, black, complete with handy hook');
INSERT INTO `products` VALUES ('ANV02', 1001, '1 ton anvil', 9.99, '1 ton anvil, black, complete with handy hook and carrying case');
INSERT INTO `products` VALUES ('ANV03', 1001, '2 ton anvil', 14.99, '2 ton anvil, black, complete with handy hook and carrying case');
INSERT INTO `products` VALUES ('DTNTR', 1003, 'Detonator', 13.00, 'Detonator (plunger powered), fuses not included');
INSERT INTO `products` VALUES ('FB', 1003, 'Bird seed', 10.00, 'Large bag (suitable for road runners)');
INSERT INTO `products` VALUES ('FC', 1003, 'Carrots', 2.50, 'Carrots (rabbit hunting season only)');
INSERT INTO `products` VALUES ('FU1', 1002, 'Fuses', 3.42, '1 dozen, extra long');
INSERT INTO `products` VALUES ('JP1000', 1005, 'JetPack 1000', 35.00, 'JetPack 1000, intended for single use');
INSERT INTO `products` VALUES ('JP2000', 1005, 'JetPack 2000', 55.00, 'JetPack 2000, multi-use');
INSERT INTO `products` VALUES ('OL1', 1002, 'Oil can', 8.99, 'Oil can, red');
INSERT INTO `products` VALUES ('SAFE', 1003, 'Safe', 50.00, 'Safe with combination lock');
INSERT INTO `products` VALUES ('SLING', 1003, 'Sling', 4.49, 'Sling, one size fits all');
INSERT INTO `products` VALUES ('TNT1', 1003, 'TNT (1 stick)', 2.50, 'TNT, red, single stick');
INSERT INTO `products` VALUES ('TNT2', 1003, 'TNT (5 sticks)', 10.00, 'TNT, red, pack of 10 sticks');
-- ----------------------------
-- Table structure for vendors
-- ----------------------------
DROP TABLE IF EXISTS `vendors`;
CREATE TABLE `vendors` (
`vend_id` int(11) NOT NULL AUTO_INCREMENT,
`vend_name` char(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NOT NULL,
`vend_address` char(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
`vend_city` char(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
`vend_state` char(5) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
`vend_zip` char(10) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
`vend_country` char(50) CHARACTER SET latin1 COLLATE latin1_swedish_ci NULL DEFAULT NULL,
PRIMARY KEY (`vend_id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1007 CHARACTER SET = latin1 COLLATE = latin1_swedish_ci ROW_FORMAT = Compact;
-- ----------------------------
-- Records of vendors
-- ----------------------------
INSERT INTO `vendors` VALUES (1001, 'Anvils R Us', '123 Main Street', 'Southfield', 'MI', '48075', 'USA');
INSERT INTO `vendors` VALUES (1002, 'LT Supplies', '500 Park Street', 'Anytown', 'OH', '44333', 'USA');
INSERT INTO `vendors` VALUES (1003, 'ACME', '555 High Street', 'Los Angeles', 'CA', '90046', 'USA');
INSERT INTO `vendors` VALUES (1004, 'Furball Inc.', '1000 5th Avenue', 'New York', 'NY', '11111', 'USA');
INSERT INTO `vendors` VALUES (1005, 'Jet Set', '42 Galaxy Road', 'London', NULL, 'N16 6PS', 'England');
INSERT INTO `vendors` VALUES (1006, 'Jouets Et Ours', '1 Rue Amusement', 'Paris', NULL, '45678', 'France');
SET FOREIGN_KEY_CHECKS = 1;
USE
选择数据库
mysql> USE customers;
Database changed
- USE 语句表示选择数据库；
- 例如在数据库操作软件中，会看到被选择的数据库（黑体加亮），而且应用标题栏将显示所选择的数据库名；
- 必须先使用USE打开数据库，才能读取其中的数据。
SHOW
显示数据库的列表
mysql> SHOW DATABASES;
+--------------------+
| Database |
+--------------------+
| customers |
| information_schema |
| mysql |
| performance_schema |
| sys |
+--------------------+
5 rows in set (0.00 sec)
- SHOW DATABASES;返回可用数据库的一个列表；
- 包含在这个列表中的可能是MySQL内部使用的数据库。
显示数据库内表的列表
mysql> SHOW TABLES;
+---------------------+
| Tables_in_customers |
+---------------------+
| customers |
| orderitems |
| orders |
| productnotes |
| products |
| vendors |
+---------------------+
6 rows in set (0.01 sec)
- SHOW TABLES;返回当前选择的数据库内可用表的列表。
显示数据表的列
mysql> SHOW COLUMNS FROM customers;
+--------------+-----------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------+-----------+------+-----+---------+----------------+
| cust_id | int | NO | PRI | NULL | auto_increment |
| cust_name | char(50) | NO | | NULL | |
| cust_address | char(50) | YES | | NULL | |
| cust_city | char(50) | YES | | NULL | |
| cust_state | char(5) | YES | | NULL | |
| cust_zip | char(10) | YES | | NULL | |
| cust_country | char(50) | YES | | NULL | |
| cust_contact | char(50) | YES | | NULL | |
| cust_email | char(255) | YES | | NULL | |
+--------------+-----------+------+-----+---------+----------------+
9 rows in set (0.00 sec)
mysql> DESCRIBE customers;
+--------------+-----------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+--------------+-----------+------+-----+---------+----------------+
| cust_id | int | NO | PRI | NULL | auto_increment |
| cust_name | char(50) | NO | | NULL | |
| cust_address | char(50) | YES | | NULL | |
| cust_city | char(50) | YES | | NULL | |
| cust_state | char(5) | YES | | NULL | |
| cust_zip | char(10) | YES | | NULL | |
| cust_country | char(50) | YES | | NULL | |
| cust_contact | char(50) | YES | | NULL | |
| cust_email | char(255) | YES | | NULL | |
+--------------+-----------+------+-----+---------+----------------+
9 rows in set (0.00 sec)
- SHOW COLUMNS要求给出一个表名，它对每个字段返回一行，行中包含字段名，数据类型，是否允许NULL，键信息，默认值以及其他信息。
- DESCRIBE customers;是它的一种快捷方式。
其他SHOW语句
- SHOW STATUS，用于显示广泛的服务器状态信息；
- SHOW CREATE DATABASE和SHOW CREATE TABLE，分别用来显示特定数据库或表的MySQL语句；
- SHOW GRANTS，用来显示授予用户（所有用户或特定用户）的安全权限；
- SHOW ERRORS和SHOWWARNINGS，用来显示服务器错误或警告消息。
- 更多的执行HELP SHOW;显示允许的SHOW语句。
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