我是一个 Linux 管理员,只有基本的 Mysql 查询知识
我想删除许多表条目,它们是 ip 地址从我的表使用 身份证,
目前我正在使用
DELETE from tablename where id=1; DELETE from tablename where id=2;
但是我必须删除254个条目,所以这个方法将花费几个小时,我怎么能告诉 mysql 删除我指定的行,因为我想跳过删除这254个条目。
不能删除整个表并导入所需的条目。
用 IN怎么样
IN
DELETE FROM tableName WHERE ID IN (1,2) -- add as many ID as you want.
像这样的东西可能会使它更容易一点,你显然可以使用一个脚本来生成它,甚至 Excel
DELETE FROM tablename WHERE id IN ( 1, 2, 3, 4, 5, 6 );
使用 IN条款
DELETE from tablename where id IN (1,2);
或者你可以合并使用 BETWEEN和 NOT IN来减少你必须提到的数字。
BETWEEN
NOT IN
DELETE from tablename where (id BETWEEN 1 AND 255) AND (id NOT IN (254));
最好的方法是使用 IN语句:
DELETE from tablename WHERE id IN (1,2,3,...,254);
如果您有连续的 ID,也可以使用 BETWEEN:
DELETE from tablename WHERE id BETWEEN 1 AND 254;
当然,您可以使用其他 WHERE 子句来限制某些 ID:
DELETE from tablename WHERE id BETWEEN 1 AND 254 AND id<>10;
如果只需要保留几行,请考虑
DELETE FROM tablename WHERE id NOT IN (5,124,221);
这将只保留一些记录,而丢弃其他记录。
其他人建议使用 IN,这很好。你也可以使用一个范围:
DELETE from tablename where id<254 and id>3;
如果要删除的 id 是连续的。
如果你的数据中有一些“条件”可以计算出254个 id,你可以使用:
delete from tablename where id in (select id from tablename where <your-condition>)
或者简单地说:
delete from tablename where <your-condition>
简单地硬编码 id 列的254个值在任何情况下都是非常困难的。
DELETE FROM table_name WHERE id BETWEEN 1 AND 256;
试试这个。
希望能有所帮助:
DELETE FROM tablename WHERE tablename.id = ANY (SELECT id FROM tablename WHERE id = id);
DELETE FROM tablename WHERE id > 0; OR DELETE FROM tablename WHERE id <255;
它从1到254删除 id