1:当新表不存在时 (即复制数据的同时创建与旧表相同结构的新表)
SELECT * INTO dbo.tableName FROM dbo.tableBackUpWHERE id BETWEEN 1 AND 20
2:新表已存在,从旧表插入数据。(注意:主键不要复制)
INSERT INTO dbo.tableName (COL1,COL2,COL3,COL4...) SELECT COL1,COL2,COL3,COL4...FROM dbo.tableBackupWHERE id between 1 and 20