drop view if exists vw_studentsumresult; create view vw_studentsumresult as#if not exists不可写,会报错 select studentname,gradename,subjectname,examdate,studentresult from result r join student s on r.studentno=s.studentno join course c on r.subjectno=c.subjectno join grade g on c.grade...
LAST_ERROR_NUMBER: 1062 LAST_ERROR_MESSAGE: Worker 1 failed executing transaction '19112042-1f97-11ee-bf09-02000aba3cbb:3747' at master log mysql-bin.000015, end_log_pos 190087781; Could not execute Write_rows event on table testdb_myisam.sbtest2; Duplicate entry '2' for key 'PRIMARY'...
[root@hisdb1 share]# grep -Eiw -B1 -A10 "engine_cost" mysql_system_tables.sql CREATE TABLE IF NOT EXISTS engine_cost ( engine_name VARCHAR(64) NOT NULL, device_type INTEGER NOT NULL, cost_name VARCHAR(64) NOT NULL, cost_value FLOAT DEFAULT NULL, last_update TIMESTAMP DEFAULT CURRENT...
后面跟的是建数据库的语句(CREATE DATABASE test) 如果不存在的话(IF NOT EXISTS),如果存在也不会删除 之后使用该数据库(use test) 接下来是表结构相关的(Table structure for table) 如果已经有该表则先删除(DROP TABLE IF EXISTS) 之后是建立mysql数据库下表的表结构的语句(Create TABLE ) 2.3 表数据的备...
CREATE DATABASE/*!32312 IF NOT EXISTS*/`ceshi`/*!40100 DEFAULT CHARACTER SET utf8*/; USE `ceshi`; --add-drop-table 在每个CREATE TABLE语句之前写一个DROP TABLE语句。 [root@host102 tmp]# mysqldump -uroot -p123456 -h127.0.0.1-P3306 --databases ceshi --add-drop-table >add-drop-table...
-n,--no-create-dbSuppress the CREATE DATABASE ... IF NOT EXISTS statement that normally is output for each dumped database if --all-databases or --databases is given. (不导出建库语句: CREATE DATABASE,也就是不导库结构) -t,--no-create-infoDon't write table creation info. (不导出建...
略2023-07-11T16:15:51.541911+08:002692InitDBtestdb_innodb2023-07-11T16:15:51.542012+08:002692QuerySHOWCREATEDATABASEIFNOTEXISTS`testdb_innodb`2023-07-11T16:15:51.542139+08:002692QuerySAVEPOINTsp2023-07-11T16:15:51.542224+08:002692Query show tables2023-07-11T16:15:51.542405+08:002692Query show...
32312 IF NOT EXISTS*/`game`/*!40100 DEFAULT CHARACTER SET latin1 */;USE`game`;--- Table structure for table `address`--DROPTABLEIFEXISTS`address`;CREATETABLE`address`( ...)LOCKTABLES`address`WRITE;/*!40000 ALTER TABLE `address` DISABLE KEYS */;INSERTINTO.../*!40000 ALTER TABLE `addr...
1、mysqldump 是⽂本备份还是⼆进制备份 它是⽂本备份，如果你打开备份⽂件你将看到所有的语句，可以⽤于重新创建表和对象。它也有 insert 语句来使⽤数据构成表。mysqldump可产⽣两种类型的输出⽂件，取决于是否选⽤- -tab=dir_name选项。l 不使⽤- -tab=dir_name选项，mysqldump产⽣的数据...
32312 IF NOT EXISTS*/`xxxxxx`/*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci */;USE`xxxx`; 备份指定数据库 # 备份test和questions库, 备份的文件中存在建库语句mysqldump.exe-uroot-proot--databases test questions > d:/test2-questions.sql# 备份test库 备份的文件中存在建库语句...