更新时间:2023-01-19 20:57:59
您是否已经考虑在该列上添加一个 check constraint
来限制值?类似的东西:
Have you already looked at adding a check constraint
on that column which would restrict values? Something like:
CREATE TABLE SomeTable
(
Id int NOT NULL,
Frequency varchar(200),
CONSTRAINT chk_Frequency CHECK (Frequency IN ('Daily', 'Weekly', 'Monthly', 'Yearly'))
)