sql数据库的创建表

1 创建一个可创建的书籍表数据表(主题编号,VARCHAR2 书名(2 0)Notnull,Varchar2 (2 0)Notnull的作者,出版社编号,单位价格编号,ISBNVARCHAR2 (5 0)价格> = 1 ),CortraintCon_Sales Check State(0,1 )); 2 为“书籍号”创建一个序列,createsequenceq_book; 3 将外键添加到发布者的“发布者”表(idnumberprimarykey); AlterTable book book Schedule addconstraintcon_publisher number exournalkey(Publisher number number)extrumeke(Publisher number number)Publisher table Reference(id);

sql server如何给表和字段添加备注并更新备注以及查询备注呢?

添加表和修改注释:\ x0d \ x0aAdded:execsp_addetedPropertyn'ms_descration',n'table',n'table',n'table,n'table'; \ x0d \ x0amodificato:execspdateExtendPropertyn'ms_desscrition',n'table',n'table'; \ x0dedified:execsp_updateExtendedPropertyn'ms_descration',n'table',n'table'; \ x0d \ x0aremarks:\ x0d \ x0aAdded:execsp_addextendedPropertyn'ms_descration',n'field Notes Notes Notes Notes。
内容',n'scama',n'dbo',n'table',n notable',n'table',n'table'; \ x0d \ x0amodificato:execsp_updateExtendedPropertyn'ms_descration',n'field Notes content',n'scama',n'scama',n'dbo',n'dbo',n'table',n'table',n'table',n'table',n'table' \ x0d \ x0amedfied:execsp_updateexentdperttyn'ms_descration',n'field notes content',n'scama',n'scama',n'dbo',n''table',n''table',n''table',n'table'

sql的数据添加语句

1 :创建生成的数据库; 2 . Create Table: CREATETABLEACO1 (Room Flow Number INT (1 0) 1 st Key, Operator Flow Number 1 0, Room Type Varchar (2 0), Room Price Point (1 0.2 ), Room Phone VARCHAR (2 0) (2 0); Second Table: CreatTableAf02 (Order Flow Number INT (1 0) PrimaryKey, Room Flow Number Int (1 0), Storage time DATETIME, Heard Time Time TimeTime VARCHAR (1 0), Guest Name VARCHAR (1 0)); 3 : Add data insertintovalue (......)和手册如下:参考后,我问我是否不知道更紧急和知道。

如何用SQL语句给表增加字段

General formula: alterTable [name Table Name] Add [field name] Field Field Fields Fields by default default value - optional parameter \ x0d \ x0a add Field: altertable [Table name] Add Name Smallintdefault0 Add digital Field, Integer, default value - 0 \ x0d \ x0aaltertable name Name Intefault Intef Intefault. 0 \ x0d \ x0aaltertable [Table Name] Add Field Name SingledFault0 Add Number Field, Single Precision Type, Default Value Is 0 \ X0DALTARTABLE [Table NAME] Add Field Name Doubledefault0 Add Number Field, Double Precision Type, Default Value Is 0 \ X0D \ X0DALTERTABLE [Table NAME] Add FIELD NAME TINYI NTDEFAULT0 Adds Numeric Field, Byte Type,默认值为0 \ x0d \ x0aaltertable [表名称]添加字段名称[null]字段字段,[null]可选参数\ x0d \ x0d \ x0d \ x0d \ x0aaltertable [table name]添加备忘录名称。
varchar(n)[null]添加一个可变长度。
Be now (), date (), etc., representing the default value \ x0d \ x0a \ x0d \ x0a (the above is most often used, and there are other attributes, you can contact a description of the type of data below) \ x0d \ x0a \ x0d \ x0a: altable Name Field \ x0d \ x0a \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d \ x0d。
AlterTable [表名称]名称更改名称varchar(n)\ x0d \ x0a \ x0d \ x0a删除表:droptable [table name] \ x0d \ x0a \ x0a \ x0d \ x0a创建表:\ x0d \ x0d \ x0a \ x0a \ x0d \ x0d \ x0d \ x0asql = OnStraintPrimaryKeyKeyKey,“ \ x0d \ x0a \ x0d \ x0a” [field 2 ] varchar(5 0),“ \ x0a \ x0d \ x0d \ x0d \ x0d \ x0a” [field 3 ] singleledeDefault0,singleledefault0,“ \ x0a“ [提交5 ] smallIntdefult0,“&\ x0d \ x0d \ x0a” [field 6 ] intdefault0,“”&\ x0d \ x0a \ x0a \ x0d \ x0a \ x0a“ [fild 7 ] [fild 7 ] datedefult() “ \ x0d \ x0a \ x0d \x0aconn。
Executesql\ x0d \ x0a \ x0d \ x0d \ x0a有一个零字段,允许零长度