由于 mysqlGenerated Column
不能FROM_UNIXTIME()
用作生成 sql,如何将 unix 时间转换为 GMT+8 人类可读日期?我失败的例子:
ALTER TABLE just_a_table
ADD COLUMN created_date
CHAR(5)
GENERATED ALWAYS
AS (FROM_UNIXTIME(created_at, "%m/%d"))
STORED;
由于 mysqlGenerated Column
不能FROM_UNIXTIME()
用作生成 sql,如何将 unix 时间转换为 GMT+8 人类可读日期?我失败的例子:
ALTER TABLE just_a_table
ADD COLUMN created_date
CHAR(5)
GENERATED ALWAYS
AS (FROM_UNIXTIME(created_at, "%m/%d"))
STORED;
由于mysql
Generated Column
不能FROM_UNIXTIME()
用作生成sql
???
FROM_UNIXTIME()
是确定性函数。它可以很容易地用于生成的列表达式。
CREATE TABLE just_a_table (created_at BIGINT); INSERT INTO just_a_table VALUES (UNIX_TIMESTAMP(NOW() - INTERVAL 1 HOUR)), (UNIX_TIMESTAMP(NOW() - INTERVAL 2 DAY));
ALTER TABLE just_a_table ADD COLUMN created_date CHAR(5) GENERATED ALWAYS AS (FROM_UNIXTIME(created_at, "%m/%d")) STORED;
SELECT * FROM just_a_table
created_at | 创建日期 ---------: | :----------- 1619167553 | 04/23 1618998353 | 04/21
db<>在这里摆弄