在许多情况下,涉及零日期或零部分的日期的en表达式的结果是NULL。如果启用了ALLOW_INVALID_DATESSQL模式,如果日期部分在1和31之间的范围内,日期不会产生任何错误,即使是对于天数少于31天的月份。 DATETIME 语法 DATETIME [(microsecond precision)] 1. 一个日期和时间的组合。 MariaDB以'YYYY-MM-DD HH:MM:SS.ff...
If the ALLOW_INVALID_DATES SQL_MODE is enabled, if the day part is in the range between 1 and 31, the date does not produce any error, even for months that have less than 31 days. Oracle Mode In Oracle mode, DATE with a time portion is a synonym for DATETIME. See also mariadb_...
Zero dates can be inserted with IGNORE. If not in strict mode, a warning is generated. NO_ZERO_IN_DATE Don't allow dates where the year is not zero but the month or day parts of the date are zero (produce a 1525 error). For example, with this set, '0000-00-00' is allowed, ...
常见的CHECK约束有: CONSTRAINT non_empty_name CHECK (CHAR_LENGTH(name) > 0) CONSTRAINT consistent_dates CHECK (birth_date IS NULL OR death_date IS NULL OR birth_date 例子:检查用户名长度是否大于0 ALTER TABLE user ADD CONSTRAINT non_empty_name CHECK(CHAR_LENGTH(username)>0); INSERT INTO user...
./dm_service_installer.sh -t dmwatcher -watcher_ini/home/dmdba/dmdatesTest/gzjTest/dmwatcher.ini-p dmwatcher 注意:文件路径要写绝对路径,不允许写相对路径。 注册监视器服务: ./dm_service_installer.sh -t dmmonitor -monitor_ini /home/dmdba/dmdatesTest/gzjTest/dmmonitor.ini -p dmmonitor ...
'ANSI','NO_AUTO_VALUE_ON_ZERO','NO_BACKSLASH_ESCAPES','STRICT_TRANS_TABLES','STRICT_ALL_TABLES','NO_ZERO_IN_DATE','NO_ZERO_DATE','INVALID_DATES','ERROR_FOR_DIVISION_BY_ZERO','TRADITIONAL','NO_AUTO_CREATE_USER','HIGH_NOT_PRECEDENCE','NO_ENGINE_SUBSTITUTION','PAD_CHAR_TO_FULL_...
一。mariadb介绍 MariaDB数据库管理系统是MySQL的一个分支,主要由开源社区在维护,采用GPL授权许可 MariaDB的目的是完全兼容MySQL,包括API和命令行,使之能轻松成为MySQL的代替品。在存储引擎方面,使用XtraDB(英语:Xtr...
'ANSI','NO_AUTO_VALUE_ON_ZERO','NO_BACKSLASH_ESCAPES','STRICT_TRANS_TABLES','STRICT_ALL_TABLES','NO_ZERO_IN_DATE','NO_ZERO_DATE','INVALID_DATES','ERROR_FOR_DIVISION_BY_ZERO','TRADITIONAL','NO_AUTO_CREATE_USER','HIGH_NOT_PRECEDENCE','NO_ENGINE_SUBSTITUTION','PAD_CHAR_TO_FULL_...
DELETE_BELOW_PARTITION_DATE = Delete any partitions with names that are dates older than this one (yyyy-mm-dd) */ DECLARE done INT DEFAULT FALSE; DECLARE drop_part_name VARCHAR(16); /* Get a list of all the partitions that are older than the date ...
>set session sql_mode='ALLOW_INVALID_DATES'; >insert into new(`d`) VALUES('201'); Query OK, 1 row affected, 1 warning (0.01sec)提示插入成功并有一个警告 该模式仅对DATE和DATETIME类型有效,而对TIMESTAMP无效,因为TIMESTAMP总是要求一个合法的输入。