[英]MySQL Alter Table Add Field Before or After a field already present
I have this, but it doesn't work: 我有这个,但它不起作用:
$query = "ALTER TABLE `".$table_prefix."posts_to_bookmark`
ADD `ping_status` INT( 1 ) NOT NULL BEFORE `onlywire_status`";
I appreciate it! 我很感激!
$query = "ALTER TABLE `" . $table_prefix . "posts_to_bookmark`
ADD COLUMN `ping_status` INT(1) NOT NULL
AFTER `<TABLE COLUMN BEFORE THIS COLUMN>`";
I believe you need to have ADD COLUMN
and use AFTER
, not BEFORE
. 我相信你需要有
ADD COLUMN
并使用AFTER
,而不是BEFORE
。
In case you want to place column at the beginning of a table, use the FIRST
statement: 如果要将列放在表的开头,请使用
FIRST
语句:
$query = "ALTER TABLE `" . $table_prefix . "posts_to_bookmark`
ADD COLUMN `ping_status` INT(1) NOT NULL
FIRST";
http://dev.mysql.com/doc/refman/5.1/en/alter-table.html http://dev.mysql.com/doc/refman/5.1/en/alter-table.html
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.