Development and Training Strategies of College Teachers Based on Data Mining Technology

Table 1

Employee information management.

Column name	Type of data	Length	Meaning	Is it empty	Restrictions
Empl_ID	Int	4	Employee ID (automatic number)	Not null	Primary key
Empl_Name	nvarchar	10	employee’s name	Not null	Nonprimary key
Empl_Sex	nvarchar	4	Employee gender	Not null	Nonprimary key
Empl_Nation	nvarchar	20	Employee nationality	Not null	Nonprimary key
Empl_Origion	nvarchar	20	Employees’ birthplace	Not null	Nonprimary key