Incorrect syntax near 'a' with enum('a','b','c') - sql

Question

CREATE TABLE ec_recurring
(
[recurring id] int NOT NULL IDENTITY,
[price] decimal(10,4) NOT NULL,
[frequency] enum('day','week','semi_month','month','year') NOT NULL,
[duration] cast(10 as int) unsigned NOT NULL,
[cycle] cast(10 as int) unsigned NOT NULL,
[trial status] tinyint(4) NOT NULL,
[trial price] decimal(10,4) NOT NULL,
[trial frequency] enum('day','week','semi_month','month','year') NOT NULL,
[trial duration] cast(10 as int) unsigned NOT NULL,
[trial cycle] cast(10 as int) unsigned NOT NULL,
[status] tinyint(4) NOT NULL,
[sort order] cast(11 as int) NOT NULL,
[date created] datetime2 NOT NULL,
[date modified] datetime2 NOT NULL,
[created by] varchar(20) NOT NULL,
[modified by] varchar(20) NOT NULL,
[active] tinyint(4) NOT NULL,
PRIMARY KEY ([recurring id])
) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;
This was my code. Why does this error happen near day and cast?
Msg 102, Level 15, State 1, Line 3922
Incorrect syntax near 'day'

Answer 1

If we are talking about T-SQL, then the error near day means that the syntax is incorrect (simply there is no enum keyword in T-SQL), it should be something like this:
[frequency] VARCHAR(10) NOT NULL,
CONSTRAINT ck_Enum CHECK ([frequency] IN('day','week','semi_month','month','year')),
Considering the second error you use cast in the wrong context, SQL doesn't know the type of the column. I believe that you wanted to write:
[duration] INT DEFAULT 10 NOT NULL
CONSTRAINT ck_Duration CHECK ([duration] > 0),
With additional checking whether duration is unsigned. You should obey the language's syntax because you have some more errors. Let the following be an example for you:
CREATE TABLE ec_recurring
(
[recurring id] INT IDENTITY NOT NULL
CONSTRAINT pl_recId PRIMARY KEY,
[price] DECIMAL(10, 4) NOT NULL,
[frequency] VARCHAR(10) NOT NULL,
CONSTRAINT ck_Enum CHECK ([frequency] IN('day','week','semi_month','month','year')),
[duration] INT DEFAULT 10 NOT NULL
CONSTRAINT ck_Duration CHECK ([duration] > 0),
[cycle] INT DEFAULT 10 NOT NULL
CONSTRAINT ck_Cycle CHECK ([cycle] > 0),
[trial status] TINYINT DEFAULT 4 NOT NULL,
[trial price] DECIMAL(10, 4) NOT NULL,
[trial frequency] VARCHAR(10) NOT NULL
CONSTRAINT ck_TrialEnum CHECK ([trial frequency] IN('day','week','semi_month','month','year')),
[trial duration] INT DEFAULT 10 NOT NULL
CONSTRAINT ck_TrialDuration CHECK ([trial duration] > 0),
[trial cycle] INT DEFAULT 10 NOT NULL
CONSTRAINT ck_TrialCycle CHECK ([trial cycle] > 0),
[status] TINYINT DEFAULT 4 NOT NULL,
[sort order] INT DEFAULT 11 NOT NULL,
[date created] DATETIME2 NOT NULL,
[date modified] DATETIME2 NOT NULL,
[created by] DATETIME NOT NULL,
[modified by] DATETIME NOT NULL,
[active] TINYINT DEFAULT 4 NOT NULL,
);

Answer 2

In Microsoft's SQL Server is no such thing as enum, it is from MySql, but you can use its equivalent:
mycol VARCHAR(10) NOT NULL CHECK (mycol IN('Useful', 'Useless', 'Unknown'))
Original Post