删除查询时出错

Question

我使用此查询删除roman＆amp;来自表格的印地文colunn值。

DELETE s.hindi, s.roman from song s where name=X;

错误：Unknown table 'hindi' in MULTIDELETE.

Answer 1

您不删除列值，只能删除整行。

DELETE查询的语法是

DELETE FROM table_name [ WHERE conditions ]

例如

DELETE FROM song WHERE name = 'X';

您可以从表中删除列，但我不确定这是否是您想要的

ALTER TABLE song DROP COLUMN hindi, DROP COLUMN roman;

您还可以更新特定列。如果您希望它们为空并且您的设计允许它，请使用NULL

UPDATE song SET hindi = NULL, roman = NULL WHERE name = 'X';