sql语句创建表级字段CREATETABLEtest_table(RIDCounterprimarykey,//主键及自动编号ClassIDintnotnull,//数字类型非空TitleText(255)NotNull,//文本类型及非空检验EditorText(50),AFromText(50),AddTimedatetime,//日期时间字段类型ContentMemo,//备注类型TotalMoneyMoney//货币类型)添加一个文本长度为200的字段altertabletest_tableaddaddziduantext(200)删除一个字段altertabletblnamedrop