VC++ SQL语句嵌套查询实例，嵌套的SQL 语句可以执行比较复杂的数据库操作，本源码介绍在INSERT 语句中嵌套使用SELECT语句。测试前请通过控制面板注册Access 数据源students，编译并运行Debug下的exe程序，如上图所示。左右列表框分别显示的table1 和table2 两个表的内容。左图表示开始table2 是空的，结构和table1 相同。单击【备份】按钮，将table1 的数据完全拷贝到table2，-VC++ SQL statement is nested query instance, nested SQL statements can perform more complex database operations, the source describes nested SELECT statement in the INSERT statement. Please register via the control panel before testing Access data sources students, compile and run under Debug exe program, as shown above. Left and right, respectively, the list box displays the contents of table1 and table2 two tables. On the left indicates the start of table2 is empty, the same structure and table1. Click [Backup] button, the data is completely copied to table1 table2,