Since MariaDB database has kept all the data’s in the filesystem so, we can easily check size of the databases and tables by navigating to the following foldervar/lib/mysql/. It won’t give you an accurate size but no major difference in the size when you comparing with the MySQL/Ma...
MariaDB provides enterprise open source database and database services to support scalability, mission-critical deployments, and more.
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book_name varchar(10) not null, --非空约束 book_price decimal(10,2) check (book_price>0), --检查约束(mysql中不支持检查约束,但是加上并不报错) book_shelf bit default 0, --默认约束 primary key (book_id), --主键 key fk_author (author_id), --外键详细写法 constraint fk_author foreig...
(20) not null, demo_price float check ( price >= 0 ), publish_at datetime, created_at datestamp, fk_id int foreign key references demo1(demo1_id)--外键设置 ) 上面的语法可以使用,但是从实际情况去考虑,(主外键的设置)应该这么做 主键建立: alter table demo add constraint pk_demo_id(这里...
MariaDB SHOW,ANALYZE,CHECK MariaDB SHOW,ANALYZE,CHECK jlive@MacBook-Pro:mariadb_scripts$mysql Welcome to the MySQL monitor.Commands end with ; or \g. Your MySQL connection id is 71 Server version: 5.5.5-10.1.10-MariaDB-log MariaDB Server...
不要使用 CHECK 约束,TDSQL 虽然不报错,但会忽略,可以使用 ENUM 类型代替。 2.2.5.3 字段类型设计 整数类型请根据实际存储值的范围选择合适的类型。 无符号整数类型请添加 UNSIGNED 关键字。 字符串类型请根据实际存储值的情况确定选择定长类型还是变长类型。 根据实际存储值的情况,尽量减少字符串类型的长度。 尽量...
A. Azure Database for MariaDB 计划于 2025 年 9 月 19 日停用,因此强烈建议尽早迁移到 Azure Database for MySQL 灵活服务器,以确保有足够的时间运行迁移生命周期,应用灵活服务器提供的优势,并确保业务连续性。Q. 现有 Azure Database for MariaDB 实例会发生什么情况?
源数据库MariaDB 10.5.8版本执行 create table t1(c1 int, c2 inet6) ENGINE = INNODB 创建表结构的DDL,该DDL在源数据库Binlog保存的为以上原生SQL,增量过程中在目标数据库MySQL 8.0.27版本中执行会报错,错误信息为“1064 - You have an error in your SQL syntax; check the manual that corresponds to ...
一、数据库管理语句 1、Syntax: CREATE {DATABASE | SCHEMA} [IF NOT EXISTS] db_name [create_specification] ... create_specification: [DEFAULT] CHARACTER SET [=] ch