mysql default value empty string
Yes - use a DEFAULT constraint: DROP TABLE IF EXISTS `example`.`test`; CREATE TABLE `example`.`test` ( `string_test` varchar(45) NOT NULL DEFAULT ... ,lark wrote: > == Quote from maya (com)'s article >> when you're creating a table, can you have a column default to an empty >> string value (instead of NULL)?
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MySQL 是一個開源的 RDBMS(關係數據庫管理系統),它支持用 C,C ++,Java,Perl 和 PHP 等各種編程語言編寫的請求。由於其高速度和靈活性,MySQL 已成為主要用於開發各種形狀和大小的 Web 應用程序的最流行的數據庫系統之一。自 1995 年上市以來,這種非常受歡迎的開源數據庫管理系統已經應用於當今幾乎所有互聯網用戶的無數項目中。今天一些最受歡迎的 MySQL 用戶是 ... MySQL 軟體介紹
mysql default value empty string 相關參考資料
Change TEXT column default from null to '' (empty string) - Stack ...
Blob and text columns cannot have a DEFAULT value (Ref). Depending on platform, MySQL may generate a warning or error when you try to ... https://stackoverflow.com default a column with empty string - Stack Overflow
Yes - use a DEFAULT constraint: DROP TABLE IF EXISTS `example`.`test`; CREATE TABLE `example`.`test` ( `string_test` varchar(45) NOT NULL DEFAULT ... https://stackoverflow.com default values: can have empty string? - MySQL - Just Skins
lark wrote: > == Quote from maya (com)'s article >> when you're creating a table, can you have a column default to an empty >> string value (instead of NULL)? http://www.justskins.com How to tell if a MySQL field has a default value of an empty ...
It seems as if MySQL will report the value as "NULL" if a default value does not exist. This means we if the field has is set to "NOT NULL" we can ... https://stackoverflow.com MySQL Bugs: #14947: Missing Default-Value "empty string"
Bug #14947, Missing Default-Value "empty string". Submitted: 15 Nov 2005 13:24, Modified: 15 Nov 2005 14:36. Reporter: Bernhard Geyer, Email Updates:. https://bugs.mysql.com Mysql WorkBench : Default varchar value as empty - Stack Overflow
Just put two quotes '' in default field for your column. Assigning an empty string as a default value in MySql Workbench. Or right-click on a ... https://stackoverflow.com NULL defaults to empty string in mysql? - Stack Overflow
For string types other than ENUM , the default value is the empty string. For ENUM , the default is the first enumeration value. In the output for describe user; , the NULL column shows NO for all th... https://stackoverflow.com Set default value if empty string is passed MySQL - Stack Overflow
A better way would be to create a trigger. Read more about the triggers on Mysql documentation. Similar answer for more details can be found ... https://stackoverflow.com [MYSQL] 設定字串欄位的預設值@新精讚
改完以後,就能夠新增資料,但不必給not null欄位值。這和設定成null但不給值的差異在於,如果設定成null但不給值新增的話,該欄位會變成NULL, ... http://n.sfs.tw |