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delete語(yǔ)句(SQL delete語(yǔ)句)

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前沿拓展：

delete語(yǔ)句

DML;DDL

delete語(yǔ)句(SQL delete語(yǔ)句)

如果需要在delete的時(shí)候，按照條件刪除記錄，那么可能會(huì)用到子查詢(xún)。

但是如下情況：

delete from student where id = (select max(id) from student);
[Err] 1093 – You can't specify target table 'student' for update in FROM clause

解決辦法是：給 from 子句中的結(jié)果集起別名。

delete from student where id = (select n.max_id from (select max(id) as max_id from student) as n);

這個(gè)方法對(duì)in還是適用的

delete from student where id in (select id from student where id > 30);
[Err] 1093 – You can't specify target table 'student' for update in FROM clause

解決方法同上：

delete from student where id in (select n.id from (select id from student where id > 30) as n) 

參考資料來(lái)源：百度百科-DELETE語(yǔ)句

delete語(yǔ)句

DELETE 語(yǔ)句
DELETE 語(yǔ)句用于刪除表中的行。
語(yǔ)法
DELETE FROM 表名稱(chēng) WHERE 列名稱(chēng) = 值

刪除某行
"Fred Wilson" 會(huì)被刪除：
DELETE FROM Person WHERE LastName = 'Wilson'

刪除所有行
可以在不刪除表的情況下刪除所有的行。這意味著表的結(jié)構(gòu)、屬性和索引都是完整的：
DELETE FROM table_name

或者：
DELETE * FROM table_name

本回答被網(wǎng)友采納

delete語(yǔ)句

delete （字段名）from 數(shù)據(jù)表 where 字句
例如：delete from 學(xué)生表 where 學(xué)號(hào)='123456'

本回答被提問(wèn)者采納

delete語(yǔ)句

delete XXXX表 where XXX=XXX

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