MySQL数据库—NodeRED连接示例

提示💡：下面所有操作，都是已经安装好mysql数据库的情况下操作；具体，如何安装数据库，这里不说明。

1、准备工作 #

1-1、创建数据库名【nodered】,字符集【utf8】; #

1-2、执行表结构文件 #

3运行SQL文件也可以自己编写SQL - 云腾五洲 — 3运行SQL文件也可以自己编写SQL

下面为示例数据库的表结构SQL代码:

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for devicedata
-- ----------------------------
DROP TABLE IF EXISTS `devicedata`;
CREATE TABLE `devicedata`  (
`id` int(11) NOT NULL AUTO_INCREMENT COMMENT 'ID',
`attributeName` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '属性名称',
`attributeValue` double(10, 2) NULL DEFAULT NULL COMMENT '数据点值',
`createTime` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '创建时间',
`tsLong` bigint(255) NULL DEFAULT NULL COMMENT 'TS时间戳',
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci COMMENT = '存储时序数据' ROW_FORMAT = Dynamic;

SET FOREIGN_KEY_CHECKS = 1;

2、MySQL数据库常规操作 #

2-1、示例代码 #

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'0' + day : day;\n    hours = hours < 10 ? '0' + hours : hours;\n    minutes = minutes < 10 ? '0' + minutes : minutes;\n    seconds = seconds < 10 ? '0' + seconds : seconds;\n\n    // 拼接成最终的字符串\n    var dateTimeStr = year + '-' + month + '-' + day + ' ' + hours + ':' + minutes + ':' + seconds;\n    return dateTimeStr;\n}\n\n//msg.topic = \"INSERT INTO user (name,address,year) VALUES (?,?,?)\";\n//msg.payload = [ \"test老大\",\"成都高新区\",\"2021-10-28\"];\n//return msg;","outputs":1,"timeout":"","noerr":0,"initialize":"","finalize":"","libs":[],"x":280,"y":380,"wires":[["1d1af8373ab6c326","c454653a7d28bfbe"]]},{"id":"026e258025329cde","type":"inject","z":"cb5f1a5e643cfd9e","name":"Go","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":"","topic":"","payloadType":"date","x":90,"y":380,"wires":[["4660fa22b87d8d64"]]},{"id":"402e02dd0e5b188f","type":"debug","z":"cb5f1a5e643cfd9e","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","x":690,"y":500,"wires":[]},{"id":"26dbb51b82fc931c","type":"inject","z":"cb5f1a5e643cfd9e","name":"Go","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":"","topic":"","payloadType":"date","x":90,"y":440,"wires":[["6ea9847db36c1e83"]]},{"id":"6ea9847db36c1e83","type":"function","z":"cb5f1a5e643cfd9e","name":"Update Data【更新数据】","func":"msg.topic = \"Update deviceData Set attributeValue = ? where id=?\";\nmsg.payload=['22.55','4']\nreturn msg;","outputs":1,"timeout":"","noerr":0,"initialize":"","finalize":"","libs":[],"x":270,"y":440,"wires":[["1d1af8373ab6c326"]]},{"id":"2ed4f22e8e973be0","type":"function","z":"cb5f1a5e643cfd9e","name":"Delete Data【删除数据】","func":"msg.topic = \"Delete From deviceData where id = ?\";\nmsg.payload = [\"4\"];\nreturn msg;","outputs":1,"timeout":"","noerr":0,"initialize":"","finalize":"","libs":[],"x":270,"y":580,"wires":[["1d1af8373ab6c326"]]},{"id":"2b7a45f6001c3eb5","type":"inject","z":"cb5f1a5e643cfd9e","name":"Go","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":"","topic":"","payloadType":"date","x":90,"y":580,"wires":[["2ed4f22e8e973be0"]]},{"id":"71f48d84444e52ed","type":"inject","z":"cb5f1a5e643cfd9e","name":"Go","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":"","topic":"","payload":"warehouse","payloadType":"str","x":90,"y":520,"wires":[["244bfcbfc5d9355c"]]},{"id":"244bfcbfc5d9355c","type":"function","z":"cb5f1a5e643cfd9e","name":"SELECT Data【查询数据】","func":"msg.topic = \"SELECT * FROM deviceData  order by tsLong desc LIMIT 10;\";\nreturn msg;","outputs":1,"timeout":"","noerr":0,"initialize":"","finalize":"","libs":[],"x":280,"y":520,"wires":[["1d1af8373ab6c326"]]},{"id":"f9e725cdeb9db454","type":"comment","z":"cb5f1a5e643cfd9e","name":"mysql常规操作：使用时，注意配置好的数据库地址\\用户名\\密码","info":"","x":250,"y":320,"wires":[]},{"id":"a8144cc72bc2c57f","type":"comment","z":"cb5f1a5e643cfd9e","name":"mysql模拟测试-双击打开查看【操作表的结构】","info":"-- ----------------------------\n-- Table structure for devicedata\n-- ----------------------------\nDROP TABLE IF EXISTS `devicedata`;\nCREATE TABLE `devicedata`  (\n  `id` int(11) NOT NULL AUTO_INCREMENT COMMENT 'ID',\n  `attributeName` varchar(20) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '属性名称',\n  `attributeValue` double(10, 2) NULL DEFAULT NULL COMMENT '数据点值',\n  `createTime` varchar(50) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci NULL DEFAULT NULL COMMENT '创建时间',\n  `tsLong` bigint(255) NULL DEFAULT NULL COMMENT 'TS时间戳',\n  PRIMARY KEY (`id`) USING BTREE\n) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8mb4 COLLATE = utf8mb4_0900_ai_ci COMMENT = '存储时序数据' ROW_FORMAT = Dynamic;","x":200,"y":260,"wires":[]},{"id":"1d1af8373ab6c326","type":"mysql","z":"cb5f1a5e643cfd9e","mydb":"b2e1fbf20d178b80","name":"mysql数据库操作","x":510,"y":500,"wires":[["402e02dd0e5b188f"]]},{"id":"c454653a7d28bfbe","type":"debug","z":"cb5f1a5e643cfd9e","name":"","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"payload","targetType":"msg","statusVal":"","statusType":"auto","x":550,"y":380,"wires":[]},{"id":"f627c7d851c92678","type":"comment","z":"cb5f1a5e643cfd9e","name":"双击打开查看【官方使用文档】","info":"官方使用文档：\nhttps://yunteng.yuque.com/to2an3/rrd8yw/vnyz2422t47m2gk7","x":150,"y":200,"wires":[]},{"id":"b2e1fbf20d178b80","type":"MySQLdatabase","name":"mysql数据库","host":"192.168.1.31","port":"3306","db":"nodered","tz":"","charset":"UTF8"}]