5.11. PostgreSQL delete table

发布时间 : 2025-10-25 13:32:25 UTC      

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PostgreSQL uses DROP TABLE statements to delete tables, including table data, rules, triggers, and so on, so be careful to delete tables. After deletion, all information disappears.

5.11.1. Grammar

DROP TABLE The syntax format is as follows:

DROP TABLE table_name; 

5.11.2. Example

In the previous section, we created two tables, COMPANY and DEPARTMENT. We can first use the\ d command to see if the table is created successfully:

runoobdb=# \d List of relations Schema | Name | Type | Owner --------+------------+-------+---------- public | company | table | postgres public | department | table | postgres (2 rows) 

From the above results, we can see that our table has been created successfully, and then we delete these two tables:

runoobdb=# drop table department, company; DROP TABLE 

Use thed command to check again and you won’t find the form:

testdb=# \d Did not find any relations. 
《地理信息系统原理、技术与方法》  97

最近几年来,地理信息系统无论是在理论上还是应用上都处在一个飞速发展的阶段。 GIS被应用于多个领域的建模和决策支持,如城市管理、区划、环境整治等等,地理信息成为信息时代重要的组成部分之一; “数字地球”概念的提出,更进一步推动了作为其技术支撑的GIS的发展。 与此同时,一些学者致力于相关的理论研究,如空间感知、空间数据误差、空间关系的形式化等等。 这恰好说明了地理信息系统作为应用技术和学科的两个方面,并且这两个方面构成了相互促进的发展过程。