sql数据库的基本实用大全。 1.数据定义语言（DDL） 2.数据操纵语言（DML） 3.数据控制语言（DCL）-Basic practical sql Daquan. 1 Data Definition Language (DDL) 2. data manipulation language (DML) 3. Data Control Language (DCL)

The “Payroll Management” is based on the salary activity for each company staff depending on their attendance. The first activity is based on saving the employees details where each employee will be given a unique Employee ID. The Admin only has the

数据库应用技术，包括Access及SQL语言的基础知识的讲解。-Database application technology, including the basic knowledge of Access and SQL language to explain.