Unlimited classification (non-recursive algorithm/Stored Procedure edition/GUID primary key) complete database example _ (1) Table Structure

Unlimited classification is an old topic. There are many solutions on the Internet, which can be divided into two genres, one using recursion, one method is to use non-recursion (of course, other auxiliary methods are required to determine the node level), but the core table structure is similar, there are three key fields (id Primary Key, parentid parent class ID, classname-theoretically, if recursion is used, the three fields are sufficient.) The complete table structure is as follows:

Create Table [DBO]. [t_class] (
[F_id] [uniqueidentifier] not null constraint [df_t_class_f_id] default (newid ()),
[F_classname] [nvarchar] (256) Collate chinese_prc_ci_as null constraint [df_f_classtest_f_classname] default (''),
[F_shortname] [nvarchar] (50) Collate chinese_prc_ci_as null,
[F_parentid] [uniqueidentifier] Null constraint [df_t_class_f_parentid] default (newid ()),
[F_depth] [int] Null constraint [df_f_classtest_f_depth] default (0 )),
[F_rootid] [int] Null constraint [df_f_classtest_f_rootid] default (0 )),
[F_orders] [int] Null constraint [df_f_classtest_f_orders] default (0 )),
[F_parentidstr] [nvarchar] (300) Collate chinese_prc_ci_as null constraint [df_f_classtest_f_parentidstr] default (''),
[F_parentnamestr] [nvarchar] (300) Collate chinese_prc_ci_as null constraint [df_f_classtest_f_parentnamestr] default (''),
[F_readme] [nvarchar] (250) Collate chinese_prc_ci_as null constraint [df_f_classtest_f_readme] default (''),
[F_addtime] [datetime] Null constraint [df_f_class_f_addtime] default (getdate ()),
[F_type] [nvarchar] (50) Collate chinese_prc_ci_as null,
[F_maxpage] [int] Null constraint [df_t_class_f_maxpage] default (0 )),
[F_no] [nvarchar] (50) Collate chinese_prc_ci_as null,
[F_isshow] [tinyint] Null constraint [df_t_class_f_isshow] default (0 )),
[F_autoid] [int] identity (1, 1) not null,
Constraint [pk_t_class] primary key clustered
(
[F_id] ASC
) With (ignore_dup_key = OFF) on [primary]
) On [primary]