Invalid default value for timestamp null My Mysql version is 5. Have a look at https://db mysql> CAVEAT: IF you define a column with CURRENT_TIMESTAMP ON as default, you will need to ALWAYS specify a value for this column or the value will automatically reset itself to "now ()" on update. 5 manual: "You cannot set the default for a date column to be the value of a function such as NOW () or CURRENT_DATE. TIMESTAMP values are stored as the number of seconds since the epoch ('1970-01-01 00:00:00' UTC). Feb 22, 2019 · 问题背景： 线上的linux服务器上的mysql服务器中导出数据库的结构。想要在本地创建一个测试版本 导出后再本地mysql上运行却报错 1067 - Invalid default value for mysql数据库中需要使用timestamp列来存储数据的创建时间和更新时间 例如，创建后台管理菜单表，只看created_at和updated_at两个字段 If the explicit_defaults_for_timestamp system variable is disabled, TIMESTAMP columns by default are NOT NULL, cannot contain NULL values, and assigning NULL assigns the current timestamp. Query is ALTER TABLE `downloads` ADD `date` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ; While it is working Mar 15, 2020 · `updated_at` DATETIME(6) NOT NULL DEFAULT CURRENT_TIMESTAMP(6) ON UPDATE CURRENT_TIMESTAMP(6), As anyone can see, I should've defined the column type as DATETIME(6). Use this query instead ALTER TABLE tablename MODIFY COLUMN timestamp_colname TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP; Aug 30, 2015 · Further review of the 5. " The changes in MYSQL 5. Sep 10, 2024 · , In addition, if the explicit_defaults_for_timestamp system variable is disabled, you can initialize or update any TIMESTAMP (but not DATETIME) column to the current date and time by assigning it a NULL value, unless it has been defined with the NULL attribute to permit NULL values. Mar 20, 2023 · When explicit_defaults_for_timestamp is set to OFF, MySQL does not use explicit DEFAULT expressions for timestamp columns, and instead, it assigns a value of ‘0000-00-00 00:00:00’ if the column is defined as NOT NULL, or NULL if it’s defined as NULLABLE. Is there a way to make it default to a NULL, instead of the CURRENT_TIMESTAMP? If the explicit_defaults_for_timestamp system variable is disabled, TIMESTAMP columns by default are NOT NULL, cannot contain NULL values, and assigning NULL assigns the current timestamp. 6. Aug 13, 2020 · Invalid default value null for timestamp Asked 4 years, 6 months ago Modified 4 years, 6 months ago Viewed 513 times Jul 29, 2017 · `start_time` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP, You can use the latter -- leave the precision specifier out of the definition. Jul 27, 2022 · When I try to create a table with non null timestamp, it requires me to add a default timestamp to it or use the implicit default. 5. Dec 11, 2013 · If the date or time column contains a NULL value, MySQL automatically sets the corresponding value in the TIMESTAMP column to the CURRENT_TIMESTAMP. . The exception is that you can specify CURRENT_TIMESTAMP as the default for a TIMESTAMP column. Apr 20, 2016 · From the MySQL 5. 5, TIMESTAMP and DATETIME columns can be automatically initializated If the explicit_defaults_for_timestamp system variable is disabled, TIMESTAMP columns by default are NOT NULL, cannot contain NULL values, and assigning NULL assigns the current timestamp. 47. Jan 21, 2020 · The first TIMESTAMP column in a table, if not explicitly declared with the NULL attribute or an explicit DEFAULT or ON UPDATE attribute, is automatically declared with the DEFAULT Whenever I edit a timestamp's default value and set it to the CURRENT_TIMESTAMP () expression and save and reload the table; it reverts back to a string 'CURRENT_TIMESTAMP' instead. MySQL query browser seems to have a bug setting the default value for TIMESTAMPS. But I am not sure why this is necessary. A TIMESTAMP cannot represent the value '1970-01-01 00:00:00' because that is equivalent to 0 seconds from the epoch and the value 0 is reserved for representing '0000-00-00 00:00:00', the “zero” TIMESTAMP value. , t2 and t3 differ in the default value for ts1. Jul 21, 2025 · 「Invalid default value for 'create_date' timestamp field」というエラーは、MySQLでTIMESTAMP型のカラムにデフォルト値を設定する際によく見られるものです。例えば、お客様のSQL文でcreate_dateカラムにデフォルト値を設定しようとしている部分で発生していると思われます。 Mar 22, 2016 · I am not able to set Current_timestamp as default value. 7. 8 release notes suggests that one change was reverted, but that you may need to to remove NO_ZERO_DATE, which is now part of the default configuration. Apr 27, 2016 · MODIFY updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP NOT NULL; The reason you are getting this error is because you are not setting a default value for the created_at and updated_at fields. x that allow the functionality are documented here: "As of MySQL 5. oksgjmf qjdwtf tzyllt wsjcx bferc ahknh lzgkgfph ydifp qvgn mqfu hhvo bpqiuf yofhi zaexr bmje