Question

我有varchar数据类型列和date数据类型列。

我必须将varchar列数据更新为PostgreSQL中的date列。

有可能吗？

感谢。

Answer 1

ALTER TABLE <tablename> ALTER COLUMN <columnname> TYPE DATE 
using to_date(<columnname>, 'YYYY-MM-DD');

Answer 2

UPDATE tableName SET dateColumn=to_date(varcharColumn, 'DD MM YYYY')

假设您正在保存“07 04 2010”

您可以在文档中找到更多示例和说明：

http://www.postgresql.org/docs/current/interactive/functions-formatting.html

Answer 3

to_date('05 Dec 2000', 'DD Mon YYYY')

Answer 4

用于类型转换的

语法：

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从varchar转换为日期

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如何在PostgreSQL中将列类型从varchar转换为日期？

4 个答案: