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PostgreSQL DROP TABLE


DROP TABLE 语句

DROP TABLE 语句用于删除数据库中已存在的表。

注意:在删除表之前请谨慎操作。删除表将导致存储在表中的所有信息丢失!

以下 SQL 语句删除了现有的表 cars

示例

删除 cars

DROP TABLE cars;

结果

DROP TABLE

显示表

为了检查结果,我们可以使用以下 SQL 语句显示表

示例

SELECT * FROM cars;

这将导致错误,因为 cars 表已不存在

结果

错误:关系“cars”不存在
第 1 行:SELECT * FROM cars;
                      ^

PostgreSQL 练习

通过练习测试自己

练习

编写正确的 SQL 语句以删除整个表 cars

 cars;
        

开始练习


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