mysql常用

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如果脚本往数据库中的某个字段插入中文 .encode('utf8')   alter table case_test_point modify column `tp_name` varchar(500) CHARACTER SET utf8mb4 NOT NULL;
alter table go_ppa_scaling_factor modify column `worst_corner` varchar(45) CHARACTER SET utf8mb4 DEFAULT NULL;
mysql 两表关联更新 update go_engage_ppa_product_item pi,go_engage_ppa_items p set pi.item_name=p.item_name where  p.id=pi.item_id ; https://blog.51cto.com/u_16175458/6783960
mysql 自动更新时间 自动获取创建时间：timestamp not null default CURRENT_TIMESTAMP 自动获取更新时间：timestamp not null default CURRENT_TIMESTAMP on update CURRENT_TIMESTAMP	Incorrect string value: '' for column '' at row 1 错误分析  ALTER TABLE `email_notice`.`go_engage_ppa_process` MODIFY COLUMN `typical_corner` VARCHAR(45) CHARACTER SET utf8 COLLATE utf8_general_ci DEFAULT NULL;
mysql  datetime MySQL导入数据库时报错：ERROR 1292 (22007): Incorrect datetime value: ‘0000-00-00 00:00:00’ for column ‘return_create_time’ at row 1 导入数据中时间字段的格式为 ‘0000-00-00 00:00:00’，报错ERROR 1292 (22007): Incorrect datetime value: ‘0000-00-00 00:00:00’ for column ‘return_create_time’ at row 1 原因中数据库的sql_mode包含 no_zero_date 模式，不支持‘0000-00-00 00:00:00’，可以使用以下方式进行修改 show variables like 'sql_mode'; ±--------------±----------------------------------------------------------------------------------------------------------------------+ | Variable_name | Value | ±--------------±----------------------------------------------------------------------------------------------------------------------+ | sql_mode | ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION | ±--------------±----------------------------------------------------------------------------------------------------------------------+ 1 row in set (0.01 sec) 临时解决方案： mysql> set global sql_mode='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION'; 永久解决方案： 添加到my.cnf里边 mysql 5.7版本的配置文件为：/etc/mysql/mysql.conf.d/mysqld.cnf sql_mode='ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION';