SQL 如何将 PG 列更改为 NULLABLE TRUE?

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时间:2020-09-01 09:04:07  来源:igfitidea点击:

How to change a PG column to NULLABLE TRUE?

sqlpostgresqlnullable

提问by mateusmaso

How can I accomplish this using Postgres? I've tried the code below but it doesn't work:

如何使用 Postgres 完成此操作?我试过下面的代码,但它不起作用:

ALTER TABLE mytable ALTER COLUMN mycolumn BIGINT NULL; 

回答by mu is too short

From the fine manual:

来自精美手册

ALTER TABLE mytable ALTER COLUMN mycolumn DROP NOT NULL;

There's no need to specify the type when you're just changing the nullability.

当您只是更改可空性时,无需指定类型。